What is the frequency?

Crossover point refers to ideally divider high pass filtering circuit signal frequency of minimum value or low frequency filter signal frequency, the highest value.

Equalizer trends

Use of digital filter consisting of equalizer is called digital equalizer, digital equalizer to make graphic EQ, parametric EQ can be made, and you can make both EQ, it not only each performance index superior, easy to operate, but also can also store multiple uses balanced frequency response characteristics for different programmes require selection, you can store up to 99 frequency response curve. SONY's SRP-E300 is a versatile 2-channel digital equalizer with 10 parametric Equalization and 29 illustrations balanced, or independent work with limiter and noise gate function, high-precision 48kHz sampling, 20-bit linear modulus/DAC; with analog and digital input/output; RS-232CC interface for external control, that it will phase out ordinary analog equalizer, is a professional audio amplification areas have very high performance-cost ratio products. Sound production: objects propagation through the air waves, vibrations, caused by a vibrating membrane for auditory senses. Human auditory 20HZ--20KHZ sensitive 1KHz--4KHz most sensitive 3.4KHz human voice male 80Hz--500Hz female 100Hz--1KHz phone 200/300--3KHZ TV 100HZ20--250 LOW (LF) 250--2KHz MID (MF) 2kHz--4KHz MH 4KHz--20KHz High (HF) 50Hz upgrade 2-3db, gives a strong sense of shock, enhanced sound 60Hz, to striking sense, not much lifting 50, 100Hz is AC frequency, upgrading is carefully 100--200Hz attenuate 3-6db, legible 100Hz following attenuation 6-12db, can increase the clarity of the language--300Hz promotion 100 3-5db increasing the richness of the music, for example: Moderator Lixiang 250--500Hz upgrade 3-6db, thick, warm for example: Moderator Zhao Zhongxiang 300--500Hz upgrade 4-5db increasing the intensity of the music to sound 330Hz gives a solid feeling of fullness the bass, but not soft, too, will have the effect of the "bathroom" effect on the intensity of the 500Hz, upgrading 2-4db gives people a sense of closeness and depth--3KHz lifting 800 3-6db, penetrating more suitable for the enhanced. also TECHNO, TRANCE now, HARD BASS, PROGRESSIVE but 800Hz Office upgrade to special care, the frequency increase would be noisy and narrow sense 1--1.5KHz upgrade 4-5db sound brightness and levels have increased, the tone is bright and smooth, especially for boys is especially apparent in the 2-2--4KHz upgrade adds voice 4db brightness 3KHz--10KHz raise 3-6db, tooth sound, enhanced presence, but also some not suitable for lifting 3KHz upgrade too much will produce auditory fatigue 4KHz Department should not mention 5KHz upgrade failure by 6db makes sound volume seems to increase the 3db, such as attenuation mixed sound 5KHz component, makes sound sense become far distance 6.8KHz upgrade too high results in scream, particularly attached microphone PA system causes high frequency feedback whistling 8KHz above a little upgrade to enhance the sound levels and color are more than a band 10KHz preferable not to upgrade or not to upgrade, to control in 3db, if they feel a sense of high frequency content, can be balanced after receiving tone actuator to compensate.

Media focus on China prepares for Olympics microphone to the stadium

April 11, a media microphone to tennis courts, recording in Chinese female tennis team member at the time of the year more training. On that day, about 130 foreign media's 220 journalist oligomerization State Olympic Sports Center, preparing for the Olympic Games to China Legion of the interview.

Cruiser e3350e3350 won the gold medal BuyCOMs

Create a variety of professional audio products sound debut PALM EXPO 2009.

The morning of May 28, eighteenth, "China International Audio • Lighting • Music and Technology" (PALMEXPO2009) in Beijing China International Exhibition Center and National Agricultural Exhibition Center grand opening. .The exhibition of more than 1,100 exhibitors will reach; exhibition area increased by 20%, will reach 85,000 square meters. .Number of exhibitors, the exhibition hall area of another history since the most organized in the worldwide scale of similar exhibitions in the exhibition ranked in the forefront. .The exhibition covers the professional audio, professional lighting, stage machinery, conferencing systems, video systems, public address system, the field of Chinese and Western musical instruments such as equipment and equipment will be fully focused on tens of thousands of exhibits to show the latest achievements in the field. .Chong Sheng Enterprise products to bring professional speakers participating in the meeting: create the sound booth scene.

PALM EXPO 2009 exhibition-in-British Po booth

May 28, 2009 in the morning, at its eighteenth session, "China international professional audio • lighting • musical instruments and technical exhibition" (PALM EXPO 2009) at the Beijing International Exhibition Center and the airport Grand opening. This exhibition exhibitors will reach more than 1100; exhibition area increased by 20%, to reach 85000 square meters. The number of exhibitors, exhibition area and the exhibition organizing history since most of the world-wide similar exhibition exhibition scale dominate. The exhibition will cover professional audio, professional lighting, stage machinery, conference systems, video systems, public address system, musical instruments, equipment and supplies, tens of thousands of new exhibits will be fully concentrated presentation of the latest achievements in the field. This exhibition British debut with new exciting treasure, so stay tuned! Here is the audio gateway (audio160) reporter from the booth the scene back in the picture. PALM EXPO 2009 exhibition-in-British Po booth PALM EXPO 2009 exhibition-in-British Po booth

Yadeng portable audio brand products appeared in BIRTV2009 AKG.

As of 2009 China International Radio, Film and TV Expo (extensive Council) is an important part of the eighteenth Beijing International Radio, Film and Television Equipment Exhibition (BIRTV2009) on 26-29 August 2009 in Beijing China International Exhibition Centre. .As the leader in professional audio industry, Tom Lee Enterprises subsidiary Yadeng sound instrument (Shanghai) Co., Ltd. to bring leading professional audio brands AKG exhibitors. .In the field, we passed the audition, the product quality so that we immediately expressed interest in the product display and purchase intentions. .By visiting Yadeng booth, which is also outside the industry to enhance awareness of our strength and hope in the future to strengthen the liaison for more product information. .AKG wireless system is in audio electronics Yadeng a long history of innovation and excellence in the full proof, but more importantly, it reflects the company on market trends and demands a thorough understanding and long-term planning, while technical innovation .It is the source of forward momentum to promote the Yadeng. .In the field, AKG gooseneck microphone all kinds of so many customers stopping exercise noted by the staff, it has the power, squelch good, anti strong, clear voice, beautiful appearance, flowing lines, elegant and so on. .In addition, Yadeng will display good quality musical instruments..

Boxing audio companies participate in the Shanghai International music exhibition

2009 Prolight + Sound 2009 October 13 to 16 April at the Shanghai New International Expo Centre held successfully. The current table by the Shanghai International Exhibition Center and the Messe Frankfurt (HK) limited. China stage arts association, China Association of recording engineer, Shanghai municipal lighting Institute, the Shanghai Orchestra Association, Shanghai cultural entertainment in association with the trade associations and other units. The exhibition covers a wide range of exhibits, including professional lighting equipment, laser technology and theatrical special effects equipment, professional audio equipment, karaoke equipment, radio and audio recording equipment, DJ equipment, meeting facilities and public broadcasting systems, architectural lighting, audiovisual technology, LED, stage, Studio and large-scale project technology, sound effects, professional lighting and sound related computer hardware and software, professional lighting and sound related accessories, projection equipment, professional lighting and sound related services, associations and the media, and other audio products category. The exhibition's visitors come from all the trade show services, import and export agents, wholesalers/retailers, equipment rental companies, professional lighting and sound engineering design company, hotel/restaurant/bar, Club/Dance/Theatre/Concert Hall nightclub, radio/TV/film and TV production, related associations/media/publications, performances, professional tuner, exhibition/conference planning, municipal construction projects, etc. Sponsors for the same period also held seminars, industry forums, live demonstration activities, activities and rich show content. It is learnt that the boxing-audio company, with its main push brand products to participate in this grand event. Boxing audio companies participate in the Shanghai International exhibition of pictures boxing audio sound companies to participate in the Shanghai International exhibition of pictures boxing audio sound companies to participate in the Shanghai International exhibition of pictures boxing audio sound companies to participate in the Shanghai International exhibition of pictures and sound

Arts sound companies to participate in the Shanghai Exhibition of pro audio

2009 Prolight + Sound 2009 October 13 to 16 April at the Shanghai New International Expo Centre held successfully. The current table by the Shanghai International Exhibition Center and the Messe Frankfurt (HK) limited. China stage arts association, China Association of recording engineer, Shanghai municipal lighting Institute, the Shanghai Orchestra Association, Shanghai cultural entertainment in association with the trade associations and other units. The exhibition covers a wide range of exhibits, including professional lighting equipment, laser technology and theatrical special effects equipment, professional audio equipment, karaoke equipment, radio and audio recording equipment, DJ equipment, meeting facilities and public broadcasting systems, architectural lighting, audiovisual technology, LED, stage, Studio and large-scale project technology, sound effects, professional lighting and sound related computer hardware and software, professional lighting and sound related accessories, projection equipment, professional lighting and sound related services, associations and the media, and other audio products category. The exhibition's visitors come from all the trade show services, import and export agents, wholesalers/retailers, equipment rental companies, professional lighting and sound engineering design company, hotel/restaurant/bar, Club/Dance/Theatre/Concert Hall nightclub, radio/TV/film and TV production, related associations/media/publications, performances, professional tuner, exhibition/conference planning, municipal construction projects, etc. Sponsors for the same period also held seminars, industry forums, live demonstration activities, activities and rich show content. It is learnt that the art can sound company, with its main push brand products to participate in this grand event. Arts sound companies to participate in the Shanghai Exhibition pictures professional audio arts sound companies to participate in the Shanghai Exhibition pictures professional audio arts sound companies to participate in the Shanghai Exhibition pictures professional audio arts sound companies to participate in the Shanghai professional audio exhibition pictures

Hiroshi Mu audio companies participate in the Shanghai Exhibition of pro audio

2009 Prolight + Sound 2009 October 13 to 16 April at the Shanghai New International Expo Centre held successfully. The current table by the Shanghai International Exhibition Center and the Messe Frankfurt (HK) limited. China stage arts association, China Association of recording engineer, Shanghai municipal lighting Institute, the Shanghai Orchestra Association, Shanghai cultural entertainment in association with the trade associations and other units. The exhibition covers a wide range of exhibits, including professional lighting equipment, laser technology and theatrical special effects equipment, professional audio equipment, karaoke equipment, radio and audio recording equipment, DJ/target = _blank > DJ equipment, meeting facilities and public broadcasting systems, architectural lighting, audiovisual technology, LED, stage, Studio and large-scale project technology, sound effects, professional lighting and sound related computer hardware and software, professional lighting and sound related accessories, projection equipment, professional lighting and sound related services, associations and the media, and other audio products category. The exhibition's visitors come from all the trade show services, import and export agents, wholesalers/retailers, equipment rental companies, professional lighting and sound engineering design company, hotel/restaurant/bar, Club/Dance/Theatre/Concert Hall nightclub, radio/TV/film and TV production, related associations/media/publications, performances, professional tuner, exhibition/conference planning, municipal construction projects, etc. Sponsors for the same period also held seminars, industry forums, live demonstration activities, activities and rich show content. It is learnt that hung, animal husbandry and sound company, with its main push brand products to participate in this grand event. Hiroshi Mu audio companies participate in the Shanghai Exhibition pictures hung-professional sound and audio company participate in the Shanghai Exhibition pictures hung-professional sound and audio company participate in the Shanghai professional audio exhibition pictures

Administration of Government Procurement Information Notice.

Ministry of Finance Order No. 19 "Regulations on Government Procurement Information Notice" has been meeting to discuss the Ministry of Finance, is hereby promulgated, September 11, 2004 into effect. .Two years on August 11 OO in order to standardize government procurement information bulletin behavior, improve the transparency of government procurement activities, to promote fair competition, according to "Government Procurement Law" (hereinafter referred to as the Government Procurement Law), to develop this approach. .The second government procurement information, refer to regulate the activities of government procurement laws, regulations, rules and other regulatory documents, and to reflect the status of government procurement activities, data and information in general. .Government procurement information notice refers to these Regulations shall be open government procurement information specified in the financial sector the government procurement information release media release to the public. .Article procuring agency shall in accordance with the relevant government procurement laws, administrative regulations and the Measures, the announcement of government procurement information. .Procurement agencies mentioned in the preceding paragraph refers to centralized purchasing agencies and other qualifications have been determined according to the procurement agency. .Article Information Bulletin should follow the government procurement information release in a timely manner, the content of uniform regulation, the relative concentration of channels, easy access to find the principle. .Article financial departments at or above the county level responsible for government procurement information bulletin on the activities of supervision, inspection and management. .However, the following responsibilities by the provincial finance department to perform: (a) shall be announced to determine the scope of government procurement information and content; (b) designate and supervise the media, government procurement information bulletin. .Article VI of the Ministry of Finance is responsible for determining the basic government procurement information bulletin scope and content of government procurement information release designated national media. .Provincial (including plans to municipalities, the same below) is responsible for determining the financial sector procurement information bulletin of the regional government the scope and content, you can specify the area of government procurement information dissemination media. .In addition to the Ministry of Finance and provincial finance departments, no other unit or individual shall not designate the release of government procurement information media. .Article VII of the government procurement information shall be specified first in the Ministry of Finance government procurement information release media announcement. .Local government procurement information can specify in their provincial financial department of the government procurement information dissemination media announcement..

Understanding the actuator

First, understand the actuator Exciter is a harmonic generator, use one of the psycho-acoustic characteristics of sound signals are modified and beautification of sound-processing equipment. By giving voice to increase high-frequency harmonics components and so on many kinds of methods that can improve the sound, tone, increased penetration of the voice, increased sound sense of space. Not only can the modern actuator to create high-frequency harmonics, but also have low frequency extension and musical styles, and other features that make the bass more perfect, more expressive music. Use the actuator enhance audio clarity, can be about sex and expressiveness. Make the sound more enchanting, lower listening fatigue, increased loudness. Although the exciter only increased to sound around the harmonic constituents 0.5dB, but the actual sounds, volume increased by about 10dB seems. The sound of auditory loudness increase markedly, three-dimensional sense of sound images, and sound isolation degree increase; improved sound positioning and layering, you can improve the sound quality of the sound playback, tape replication rate. Because the sound signal transmission and recording process will be a loss of high frequency harmonics components, high-frequency noise. At this point, the former with the actuator to signal to compensate, the latter available filter will filter out high frequency noise, and then create a treble components, ensure playback sound quality. Actuator in need audio ' system of sound and timbre to discrimination, according to subjective listening evaluation. Second, the function key describes page〈 1 > IN/OUT with and without actuator effect select page〈 2 > TUNE (tune) actuator signal fundamental frequency regulation page〈 3 > MIX (mix) harmonic output control page〈 4 > HIGH/NORMAL. HARMONICS。 Which HIGH-frequency harmonics that do not produce, applicable to the human voice and musical instruments, such as a single sound source; NORMAL mean to produce common harmonic, apply to the whole music soloist of music. The above four function keys called auditory stimulation apparatus partial (AURALEXCITER) for high-frequency harmonics and sound penetrating power. Page〈 5 > OVERHANG (bass holding time) bass length adjustment page〈 6 > GIRTH (low volume) bass intensity adjustment. The above two function keys is a low-frequency extension of actuator is a unique on bass (BIGBOTTOM).

Mixer level adjustment method resolution

(1) input level adjustment to adjust the input level, preferably not and speaker connections, first with the headset connected mixer headphones Jack, listens to the output of audio signals, and then set the left and right master channel fader potentiometer to minimum, gradually pushing up until you hear the input signal, you are ready to listen. When all the sources are connected properly, the system opens, adjust each channel reception sensitivity, first, to set the input channels of the lowest sensitivity, and is then slowly increase. By: first Attenuator (PAD) switch is placed ON Office, will gain (GAIN) for the-20dB, faders attenuator placed in 5-10 scale, the first channel of the audio source signal (CD, LD machine or vocal, musical instrument sound, etc.) to the actual playing maximum volume Express, observation overload monitor, if the display lights up, the output signal level audio sources should be reduced. In General, you should increase the input gain adjustment (GAIN) to its optimal level until the peak overload indicator just in maximum peak is shining on it. But if the gain control (GAIN) all the way up, the peak indicator is not lit, at this point, you can put the gain button to minimum, buffer PAD to OFF, then slowly open the gain control until the display lights shining peak; if the light is not lit, you should check the wiring is correct. In addition, when peak overload monitor display, the level distance overload peak also poor 3dB. In the play, display in the audio signal of loud Office briefly flashing it is normal to do good, and the adjustment of the level signal level is desirable. But if the monitor frequently brilliant, the signal level (or a mixer gain) is too large, should be suppressed. (2) a channel adjustment after the faders attenuator pushed all the way to the small office, and then adjust the other channel, you can prevent the previous channel noise another channel adjustments. When all the channels are adjusting well to the left and right master channel faders Attenuator is placed minimum location, turn off the sound mixer and then with the speakers are connected, open a mixer; then you can set the master channel faders attenuator gradually pushing up to adjust to an appropriate level of action. (3) for the input level adjustment also note matches when individual adjustment input level match will not be able to connect the speakers, headphones signal, then the master faders can be located on the minimum level, and slowly increase the output level up to feel fit. When all of the sound source connected before you can open the entire system. Here each signal input sensitivity of match is very important for each channel separately. (4) channel faders and master faders attenuator using channel faders position, mainly depends on the adjusted settings general channel faders has the best coverage in the range audio signal with minimal noise and distortion, and maximum adjustable resistance. The EMX series products, the range in the faders of the 5-15 between ticks. (5) when determining the input master faders while at the same time should also be Note VU level meter display. VU-meter readings does not exceed OVU scale, higher than this number, description of the level is too high, the power amplifier will arise as a result of overload distortion. It is necessary to pay attention to any one input channel level changes will affect the overall output level. When the final regulation master faders to small step, but if the master faders cannot be set at an appropriate scale of high and low (less than or equal to 20 or greater than or equal to 5), channel input level is not adjusted well, need to be adjusted until the master faders to push in the right location, VU meter with appropriate instructions.

Yuan road technology by YAMAHA0708 annual professional audio dealer award

2007-2008 is $ road stability and rapid development of science and technology of the year, as well as a Yuan road & harvest year. Yuan road, science and technology in the efforts of all staff, and won the YAMAHA0708 annual professional audio dealer award. May 2008 YAMAHA PA Department of the Kyrgyz in China see zhe Zhang Zai Minister and Deputy Minister of armies to Yuan road technology for business visit and presentation, Cao Dong Sheng General Manager describes fundamental cellular road technology as well as in internal promotion YAMAHA DME series products and strategies, application of occasions. The two sides also products for China market, improvement, service, marketing, advertising and other issues in-depth discussions. The two sides on the results of this meeting were very satisfied, on the Chinese mainland region 2008-2009 market full of confidence. About Shanghai Yuan road information system technology co., Ltd. Shanghai Yuan road information system technology co., Ltd. is a high-tech, professional systems integration company, specializing in intelligent central control system, multifunctional conference systems, multimedia systems, audio lighting system, engine room supervisory system, big-screen splicing system, public broadcasting system, and security monitoring systems, cabling system, and system integration. Company to "professional products and quality services" for the purpose, high technology, quality and prestige for life, and formed a "technical services, product distribution, system integration," as the main body of the company's marketing system. Company a good reputation, superb technology, excellent team, good service and timely response is the company's exposure in the industry praise. To technology and the integration is renown for audio/video industry. The company provides technical consulting, engineering, design, product, supply, construction to service and long-term maintenance, and so on Omni-directional support. Notable works: Dalian fifth ASEM economic ministers ' meeting, Hainan Boao Forum for Asia, Chongqing Exhibition Center: Asia-Pacific city mayors Summit. Our partners: OPTIMUS, INNEX, YAMAHA, CRESTRON, DIS, RANE, DAS, etc.

PALM EXPO 2009 exhibition-true Vocality KTV audio booth

May 28, 2009 in the morning, at its eighteenth session, "China international professional audio • lighting • musical instruments and technical exhibition" (PALM EXPO 2009) at the Beijing International Exhibition Center and the airport Grand opening. This exhibition exhibitors will reach more than 1100; exhibition area increased by 20%, to reach 85000 square meters. The number of exhibitors, exhibition area and the exhibition organizing history since most of the world-wide similar exhibition exhibition scale dominate. The exhibition will cover professional audio, professional lighting, stage machinery, conference systems, video systems, public address system, musical instruments, equipment and supplies, tens of thousands of new exhibits will be fully concentrated presentation of the latest achievements in the field. This exhibition true Vocality audio with new exciting KTV debut, so stay tuned! Here is the audio gateway (audio160) reporter from the booth the scene back in the picture. PALM EXPO 2009 exhibition-true Vocality KTV audio booth PALM EXPO 2009 exhibition-true Vocality KTV audio booth

PALM EXPO 2009 exhibition booth-Ennis

May 28, 2009 in the morning, at its eighteenth session, "China international professional audio • lighting • musical instruments and technical exhibition" (PALM EXPO 2009) at the Beijing International Exhibition Center and the airport Grand opening. This exhibition exhibitors will reach more than 1100; exhibition area increased by 20%, to reach 85000 square meters. The number of exhibitors, exhibition area and the exhibition organizing history since most of the world-wide similar exhibition exhibition scale dominate. The exhibition will cover professional audio, professional lighting, stage machinery, conference systems, video systems, public address system, musical instruments, equipment and supplies, tens of thousands of new exhibits will be fully concentrated presentation of the latest achievements in the field. This exhibition brought new wonderful Ennis debut, so stay tuned! Here is the audio gateway (audio160) reporter from the booth the scene back in the picture. PALM EXPO 2009 exhibition booth-Ennis

St. Paul to participate in Shanghai International Exhibition of professional lighting and sound.

2009 Shanghai International Exhibition of professional lighting and sound, in October 2009 from 13 to 16 at the Shanghai New International Expo Center a success. .View this event by the Shanghai Center for International Ltd and Messe Frankfurt (HK) Limited. .Society of Chinese stage art, sound engineer of China Association, the Shanghai Illuminating Engineering Society, Shanghai Performance Industry Association, Shanghai Industry Association, and other cultural and entertainment co. .The show exhibits cover a wide range, including professional lighting equipment, laser technology and stage special effects equipment, professional audio equipment, karaoke OK equipment, broadcasting and recording equipment, DJ equipment, meeting facilities and public broadcasting systems, building lighting, audio-visual technology, .LED, stage, studio and large-scale project technology, sound technology, professional lighting and sound-related computer hardware and software, professional lighting and related accessories, projection equipment, professional lighting and sound-related services, associations and media, audio product categories. .The exhibition shows visitors from the industry Calvary service jobs, import and export agents, wholesalers / retailers, equipment rental companies, professional lighting and sound engineering design company, hotel / restaurant / bar, club / dance hall / nightclub theater / concert hall ., radio / television / film production, related associations / media / publications, performing groups, professional tuner, exhibition / conference planning, municipal construction projects. .Organizers also held technical exchanges over the same period, industry forums, live demonstrations and many other activities to enrich the exhibition contents. .It is reported that St. Paul, the main push to bring its brand of audio products, attended the event. .St. Paul St. Paul to participate in Shanghai Audio Show picture Show picture companies to participate in Sao Paulo, Shanghai stereo sound development of the company to participate in Shanghai to participate in Shanghai stereo image St. Paul St. Paul participated in the Shanghai Exhibition picture Exhibition picture St. Paul to participate in audio sound Shanghai Show Pictures.

Lihua stereo audio companies to participate in Shanghai International Exhibition.

2009 Shanghai International Exhibition of professional lighting and sound, in October 2009 from 13 to 16 at the Shanghai New International Expo Center a success. .View this event by the Shanghai Center for International Ltd and Messe Frankfurt (HK) Limited. .Society of Chinese stage art, sound engineer of China Association, the Shanghai Illuminating Engineering Society, Shanghai Performance Industry Association, Shanghai Industry Association, and other cultural and entertainment co. .The show exhibits cover a wide range, including professional lighting equipment, laser technology and stage special effects equipment, professional audio equipment, karaoke OK equipment, broadcasting and recording equipment, DJ equipment, meeting facilities and public broadcasting systems, building lighting, audio-visual technology, .LED, stage, studio and large-scale project technology, sound technology, professional lighting and sound-related computer hardware and software, professional lighting and related accessories, projection equipment, professional lighting and sound-related services, associations and media, audio product categories. .The exhibition shows visitors from the industry Calvary service jobs, import and export agents, wholesalers / retailers, equipment rental companies, professional lighting and sound engineering design company, hotel / restaurant / bar, club / dance hall / nightclub theater / concert hall ., radio / television / film production, related associations / media / publications, performing groups, professional tuner, exhibition / conference planning, municipal construction projects. .Organizers also held technical exchanges over the same period, industry forums, live demonstrations and many other activities to enrich the exhibition contents. .It is reported that Lihua sound companies, the main push to bring its brand to participate in the event. .Lihua stereo audio companies to participate in Shanghai International Exhibition of pictures Lihua stereo audio companies to participate in Shanghai International Exhibition of pictures Lihua stereo audio companies to participate in Shanghai International Exhibition pictures.

Fenghe professional audio electronics companies to participate in Shanghai Exhibition.

2009 Shanghai International Exhibition of professional lighting and sound, in October 2009 from 13 to 16 at the Shanghai New International Expo Center a success. .View this event by the Shanghai Center for International Ltd and Messe Frankfurt (HK) Limited. .Society of Chinese stage art, sound engineer of China Association, the Shanghai Illuminating Engineering Society, Shanghai Performance Industry Association, Shanghai Industry Association, and other cultural and entertainment co. .The show exhibits cover a wide range, including professional lighting equipment, laser technology and stage special effects equipment, professional audio equipment, karaoke OK equipment, broadcasting and recording equipment, DJ equipment, meeting facilities and public broadcasting systems, building lighting, audio-visual technology, .LED, stage, studio and large-scale project technology, sound technology, professional lighting and sound-related computer hardware and software, professional lighting and related accessories, projection equipment, professional lighting and sound-related services, associations and media, audio product categories. .The exhibition shows visitors from the industry Calvary service jobs, import and export agents, wholesalers / retailers, equipment rental companies, professional lighting and sound engineering design company, hotel / restaurant / bar, club / dance hall / nightclub theater / concert hall ., radio / television / film production, related associations / media / publications, performing groups, professional tuner, exhibition / conference planning, municipal construction projects. .Organizers also held technical exchanges over the same period, industry forums, live demonstrations and many other activities to enrich the exhibition contents. .It is reported that Fenghe electronics companies, the main push to bring its brand to participate in the event. .Fenghe professional audio electronics companies to participate in Shanghai Exhibition pictures Fenghe professional audio electronics companies to participate in Shanghai Exhibition pictures Fenghe professional audio electronics companies to participate in Shanghai Exhibition pictures.

-Po sound companies to participate in the Shanghai Exhibition of pro audio

2009 Prolight + Sound 2009 October 13 to 16 April at the Shanghai New International Expo Centre held successfully. The current table by the Shanghai International Exhibition Center and the Messe Frankfurt (HK) limited. China stage arts association, China Association of recording engineer, Shanghai municipal lighting Institute, the Shanghai Orchestra Association, Shanghai cultural entertainment in association with the trade associations and other units. The exhibition covers a wide range of exhibits, including professional lighting equipment, laser technology and theatrical special effects equipment, professional audio equipment, karaoke equipment, radio and audio recording equipment, DJ equipment, meeting facilities and public broadcasting systems, architectural lighting, audiovisual technology, LED, stage, Studio and large-scale project technology, sound effects, professional lighting and sound related computer hardware and software, professional lighting and sound related accessories, projection equipment, professional lighting and sound related services, associations and the media, and other audio products category. The exhibition's visitors come from all the trade show services, import and export agents, wholesalers/retailers, equipment rental companies, professional lighting and sound engineering design company, hotel/restaurant/bar, Club/Dance/Theatre/Concert Hall nightclub, radio/TV/film and TV production, related associations/media/publications, performances, professional tuner, exhibition/conference planning, municipal construction projects, etc. Sponsors for the same period also held seminars, industry forums, live demonstration activities, activities and rich show content. It is learnt that Po audio company, with its main push brand products to participate in this grand event. -Po sound companies to participate in the Shanghai Exhibition of photo-specialty audio audio company in Shanghai Bao professional audio show pictures-Po audio company participate in the Shanghai Exhibition of photo-specialty audio audio company in Shanghai Bao professional audio show pictures-Po audio company participate in the Shanghai professional audio exhibition pictures

Meyer Sound products characteristics--active design

Active design Meyer Sound's active design is one of the big features, this technology is the Meyer Sound company's latest technology. This unique active design only Meyer Sound. First, a special built-in amplifier for the driver to provide specific protection, allows the driver to maximize effectiveness, get higher sound pressure and better sound quality, and extended the unit life. But in the traditional way, the power amplifier limiter only protect yourself, your speakers and amplifier of limiting point and inconsistencies, it is difficult to have it both ways, therefore, not be less than the nominal of the sound pressure level, is the power signal too much cause distortion. In order to guarantee the system availability, in the traditional way, but to increase the power amplifier or speaker power margin, not only failed to make the system performance to achieve perfection, also created the financial waste. Secondly, because the built-in amplifier and electronic dividers designed specifically for the corresponding speaker, back to this point, both crossover, or its damping factor. Follow rate and impedance matching is done perfectly, thus ensuring a perfect performance of the entire system. But in the traditional way, power amplifier and speaker design and manufacturing as separate match between them, it is difficult to meet the requirements, which greatly affected the final performance of the system. Third, this is the active design of electronic systems and speakers as a whole, the system of frequency and phase response to get better control, systems of distortion so it dropped dramatically. This design will not only be able to guarantee the system's advantages, and making the system field installation required to adjust work substantially reduced. In concert, this benefit will be more prominent. Fourth, the active sound box integration design makes the whole system is very easy in the establishment of the variable. The traditional way in those complicated wiring is a power cord and a signal cable replaced the tense scene operation error may be reduced to a minimum so that system security is significantly improve the selection of specially crafted speaker unit Meyer Sound products are used by the speaker units, is rigorously tested from other manufacturers of production units (such as the famous JBL) the crop filter. As Mr. JohN Meyer, although some of the performance of these units is superior, but is simply unable to meet their design requirements. Therefore, only use these units of magnetic cylinder and skeleton, but other critical components, such as paper basin (coated and NASA to develop privacy coatings), voice coil (impregnated with special magnetofluid seal), and all of its own design and production. After that, it's also a unit test for rigorous aging, pick out the final qualifying product. Therefore, Meyer Sound production unit, is JohN Meyer of original research results into the traditional technology of new products, it is different from the other any products that are truly rare. With extraordinary performance of high-quality speakers. The precise nature of Meyer Sound's speakers have a common characteristic is its precise nature, this is the other brands of speakers are difficult. As Meyer Sound products treble trumpet and drive through the special design, it points to the wide angle control is very accurate. In its means of nominal angle range, to ensure the high-frequency response is flat, but once outside this range, the high-frequency response will rapidly decline 6 ~ 12dB. Meyer Sound loudspeaker case, is also the basis of this behavior by design. The precise nature of the biggest advantage is that the system design of the sound field of the expected results and the final effect is very close, making the entire field of frequency response and sound pressure for uniformity in design have a basis in order to better ensure that the final result. If the means of indicators is not accurate, the designed system can have serious speaker and the speaker of the mutual interference between the so-called comb filter effect, so that the system of frequency and phase response is compromised, according to the sound of the acoustic field of turbidity. Low distortion Meyer Sound in addition to using these technical means, to each speaker's bass unit phase calibration, back to this guarantees its products to achieve maximum sound pressure level is still able to maintain a minimal degree of Cardiff. This makes the Meyer Sound loudspeaker can give very clear and loud voice. Intelligent power supply system all the performance of the senses, power quality, bad power supply will bring to the system or even hum, damage the device. Meyer Sound active speakers use smart AC power system with automatic voltage selection, EMI filters, soft current switches, voltage, bi-current circuit-breakers, a variety of advanced design, causes more problems immediately. It is able to maximize the guarantee system in all cases of normal use, elimination of your power problems concerns.

Luohe second high school multimedia classroom equipment project tender notice

Luohe second high school multimedia classroom equipment project tender bid number: LHZCH [2009] 04, according to the operational needs of procurement for Trustees on luohe luohe second high school multimedia classroom equipment projects for public tender, welcome supply installation capability of the manufacturer or to participate in the tender notice about matters are as follows: first, the tender project name: luohe second high school multimedia classroom equipment project II, tender of goods: Super 16, overhead projector, screen, 16 power amplifier, speaker, etc., on the tenderer's qualification requirements: one, you must have the public procurement Act provided for in article 22; 2, the registered capital of 100 million Yuan (including 100 million); 3, has the tender product (projector) to the manufacturer's authorized agent qualifications; 4, when bidders bid opening shall provide projector prototype, on-site demonstrations; 5, this project is a joint bid, the bidder declined should be independent of the bidder. 4. sale of tender information sales tender time: February 16, 2009 to March 2, 2009, 8: 00 a.m.-11: 30, 14: 00-17: 30 (except holidays). Purchase tenders shall carry license copy or copy (with the effective date, and add and specify the use of the "offer" or "with the original line, the words"). Sale of tender address: luohe municipality main building, room 207 tender price: 100 Yuan/sets, aftermarket is not refundable; fifth, tender documents for information: tender documents accepted locations: luohe municipality main building 210 rooms bid deadline: March 9, 2009 (Monday) 9: 00 six bid、 on March 9, 2009 (Monday) 9: 00 opening of tenders: luohe maanshan meeting room 7, Attn: Mr. Hu, ju, Tel: (0395) 31865163162516 eight, the tender notice in the Chinese Government procurement network "," Henan provincial government procurement network, luohe city network, the luohe government procurement network "(www.lhzfcg.com) publishing. The successful results of the evaluation by the jury, in the Henan provincial government procurement network, luohe city network, the luohe government procurement network "on notice, the bidders who have objections to the bidding institution. 9. supervision Tel: luohe municipality (0395) 3150223 luohe procurement for February 16, 2009

On the speaker impedance

General audio equipment commonly cited impedance of loudspeaker impedance, pre-amp expanding machine input impedance, fore output impedance, (after the class is typically not called output impedance, and that output resistance), the transmission of the signal line blocking resistance (or characteristic impedance) ... ... And so on. Due to the impedance of the units still ohm, Ohm's law also applies, in short, in the same voltage, the higher will flow through the impedance less current, the lower the impedance will flow through the more current. The most common to the loudspeaker impedance of 8 Ohms is marked values, representing the trumpet in a factory test specifications, when input 1KHz of sine wave signal, it renders in eight-Ohm impedance value is, or is in the Horn of frequency response range, an average of impedance value. It is not a fixed value, but rather as the frequency. When after the class output a fixed voltage to the trumpet, according to Ohm's law, 4 ohm speakers than the eight-ohm speakers more electricity flowing through a times, theoretically, an eight-ohm output 100 Watt Crystal after the class, in four-ohm speakers connected automatically to 200 watts. When the speaker impedance value all the way down, after a fixed voltage level output, it will flow through the current increasing, in the end it seems a bit like the speaker cord directly short-circuiting, impedance values sometimes low-ohm, outside this range, the machine will be burned. This is generally used to say: after the level of power is not big, but the output current to big it is not truth.

Guangzhou sing the "Bird's Nest" the strongest voice.

"There is no sound, no matter how good the opera can not get out!" Another 9 days, the Beijing Olympic Games has attracted worldwide attention in the National Stadium "Bird's Nest" officially kicked off. .How can 10 million viewers at the scene, and billions of television viewers around the world ensure that the station before the Olympic drama singing a gun, smooth over and over, the glory of this historic mission will be from Guangzhou Panyu Rui Feng audio exclusive commitment .. .Since November 2006 was identified as the "Bird's Nest" venue sound reinforcement system has been only designated audio brand, the company has been worth fighting for nearly two consecutive years. .The occasion of the forthcoming opening of the Olympic Games, the reporter went again yesterday Rui Feng sound companies, to understand the drama of the Olympic Games with the expertise to ensure the smooth singing of little insider story. .Text / Photo: Ye Pingsheng reporter correspondent Xu Fengyun "Bird's Nest" full disclosure of technical data sound system at 13:00 on January 22 2008 the whole, with the third group OP4922L East Stand audience slowly rising linear array of speakers, " .Bird's Nest "Speaker hoisting been completed. .The reinforcement system of the hanging data includes: the total design load capacity: 48 tons; actual total static load: 24 tons; actual total dynamic load: 38.6 tons; structural load-bearing steel structure: 6 tons; linear array of speakers: 236 .; make voice box: 500; speaker connectors: 120. .The reporter was informed that during the Olympic Games in Beijing, "Bird's Nest" stadium will have a 236 line array speakers divided into 24 groups and 500 together make up the sound box, to ensure competition, performances and various sounds will be able to speak clearly and smoothly .to send out. .Clear voice such as "whispers" "Bird's Nest" is an area of 25.8 million square meters of large sports venues, the main steel structure building. ."Nest" inside a total of 80,000 seats, together with additional temporary seating to accommodate the site during the Olympics it will be more than 10 million people. .As the "Bird's Nest" venue sound reinforcement system is the only designated brands, Guangzhou Rui Feng, Chairman Wang Ruixiang told reporters that sound, in order to ensure the "nest" of each position of the audience can clearly hear every wonderful moment of Olympic drama, .their "nest" around the dome of the 236 primary total installed public address speakers, as well as the complement of 500 auxiliary sound box. .All of these speakers are located in Panyu District Rui Feng enterprise production, its safety factor highest in the world, a total of 3 sets of backup system. .Among them, the main PA speakers with the world's largest professional line array speaker - OP4922L line array speakers. .This 236 is divided into 24 main PA speaker groups, pointing to the audience and the competition venues, each with different requirements according to PA, from 4 to 14 component speakers. .Among them, the number of the largest groups of sound in the top of the podium, pointing across the auditorium. .This reporter learned that, "Bird's Nest" 236 speakers are the main extension installed by hanging out, dispersed in the "nest" around the dome, the from the audience following the recent 42 meters, the longest is over 68 meters. .Olympic venues, according to the sound target, "nest" the language of sound reinforcement system to achieve clarity STI value of 0.6. .And Rui Feng LAX sound system installation, after the previous stage, "Good Luck Beijing" test series and other activities, the language definition does STI values to 0.6. .Rui Feng audio company responsible for the "Bird's Nest" sound system engineering industry, technical director Chen Jian, told reporters it sound just like "whispers in the ear" almost. .Hoisting rope is more rain during the Olympics wind, "Bird's Nest" staged the opening and closing ceremonies for each of programs, each of the sports events in order to sing well, sent to the scene to clear the ears of 10 million viewers, not only to solve " .Bird's Nest "Steel Material established problems of poor acoustic environment, but also must ensure that any possible outbreak of the audience through out the cheers, cheering and various other" noise. " .To this end, Rui Feng companies from the speaker's selection, design technology and other technology public relations professional level to proceed to the final successful resolution of the problem. .The field measurement, this linear array speakers 236 OP4922L the highest sound pressure level can reach 112 decibels. .According to the relevant previous determination of the case in the packed audience, the largest nest environmental value of the reflected sound (noise) was 96 dB. ."(Sound reinforcement system to send sound signals) over (it) 6 db can guarantee clearly heard as the audience." 112 dB maximum SPL can guarantee that even the most exciting time in the pit, expansion .sound system can also be the sound from the sound source to send out a clear signal, while not the formation of unpleasant effects. .Reporter was informed that although the "Bird's Nest" is a steel structure construction, but the weight still had the time of the tender sound reinforcement system is an important indicator. .Industry, said Chen Jian, in order to reduce weight while enhancing the sound effects, choice of material for them to make use of "softer" materials, in which case some of the speakers on the selection of the Baltic birch. .This material due to its high hardness, light weight characteristics, the price than their previous speaker enclosure materials commonly used "double." .This reporter learned that, even so, the complete lifting, all 24 sets of main speakers expanded material related accessories plus the amount of the total load in the static case is still reached 24 tons, while taking into account their "Bird's Nest" venue .wind, resulting in lifting the case of speakers swing, the total dynamic load capacity will increase by 60% to 38.6 tons. .They will be mainly through the load-bearing steel wire rope and insurance, lifting the Bird's Nest around the dome. .To do this, just to hang speaker load-bearing steel structure to the structure and weighed 6 tons. .Moreover, as these speakers are installed in a half hanging out the open-air venues, they have taken a number of "rain" measures to prevent water intrusion of sound speaker cabinet. .Pictures of the topic: Wang Ruixiang provide happiness: Can live to regret in the Olympic Games Technical Support: hand-held special permits can only listen to can not see in yesterday's interview, Wang Ruixiang showed reporters during the Olympic Games in Beijing a special permit. .This number "6112302-01" and "5" special pass, issued by the Beijing Olympic Organizing Committee. .With this "Certificate No. 5", he can freely include the "Bird's Nest", Digital Beijing Building, Olympic Park, public areas, work area broadcasters, and include the "Bird's Nest" Olympic Stadium, the Qingdao International Sailing Center and other various .playing field area, viewing distance track and field, football, modern pentathlon, archery, sailing and other exciting activities in the Olympic tournament. .In the company, and Wang Ruixiang, like, holding Olympic "5, special permit" employees, as well as 20. .Their task is to the entire Beijing Olympic Games and the subsequent Paralympic Games, the Olympic Games for the successful sing the drama escort to provide sound technical guarantee. .Pass holders free access to the venue the company did in the Rui Feng Chen Jian industry more than 6 years, from 2006 to participate in the "nest" sound from the time the tender, has been involved in this work, has been more than 2 years. .During the Olympics, he also holds a "Bird's Nest" Beijing five major Olympic venues such as the special permit, free access to the playing field area of the project. .Ordinarily, this should be a very happy thing, but Chen Jian industry, told reporters in Beijing during the Olympic Games, they can not live to see the Olympic Games, but can only "hear" the Olympic Games! .As technical support personnel, they have to stay in the "nest" inside the audio master control room at any time monitor the working conditions inside each speaker, which group of speakers if it is found is not normal transmission of signals, the system will automatically enable the backup process immediately .device, "within a few seconds at the zero, the sound sent out in time." Thus, the audience will not feel the impact of what's produced. .All day but can not abandon the Olympic stadium watching the game, it makes them feel that this is Chen Jian industry some "regret", but "it can not help. After all, our job is in the audio switchboard room." .And participation in lifetime technical support to the Olympic Games among the Chen Jian industry believes that this should in any case is a "happy" things..

Audio Network October 20 - 24 weeks of information to the text.

"Three Connaught Cup" China Industrial Design sixth different tournament starting value, the "three Connaught Cup" China Industrial Design sixth start since the 2002 tournament held since the inaugural competition, Shenzhen City Connaught (3NOD) Electronics Co., .Companies in the country have been held for five times, has become well-known industrial design competitions. .Design schools, design firms and corporate design departments actively participating designers, attracting tens of thousands of designers and good works. .To this the design of high-impact and value of brand activities continue, and foster competition to become a famous brand, is organizing the sixth "three Connaught Cup" China Industrial Design Classic. .Meanwhile, the contest is listed as the "2008 International Industrial Design Summit Forum and the Thirteenth Annual Meeting of the National Industrial Design," a key project ......>> Lock detailed information LG 22X DVD burner carved a new refresh .LG Electronics LG 22X standard lock code listing of recent engraved optical storage industry in no small vibration caused, stable performance, "security work" in the market competition in Moscow, favored a more thorough update of the user to buy DVD recorder .the new standard machine! .June 25, 2008, the world's leading optical storage manufacturer, LG technology leader in the identity of the first to launch a strong stance "22X engraved lock code", high-speed, stable, secure solution to the user for too long in the burning process, .pick a bad disc or engraved plate, highly technical problems of this data is lost. .Subsequently, LG Electronics took the lead in early July slumped to 199 yuan, and quickly set off in the market price of 199 yuan storm, also became a model for many brands have ......>> more information Zhengzhou International Sound 2008 .Opening this week for better visual appreciation of the Central Plains region, driven by the development of sound ring fever, the fever increased the level of the Central Plains region, this new route by the Zhengzhou Media Center's "2008 audio visual Zhengzhou International Festival," and for the majority of .A set of audio enthusiast show, music appreciation, experts say talk, fever communication exchange of large enjoy! .Audio Center in Zhengzhou Shinkansen will be invited to Hong Kong a number of senior commentator for the all the detailed acoustic assessment and answers questions you Shaoyou. .Hope that through this exhibition's success, the Central Plains region of our circle to bring the sound of fever and development of a broader vision of space ......>> more information on "smart technology services to education" - 2008 Panasonic high-end projection .Machine Beijing Railway Station October 18, 2008 pm 16 pm Yanqi Huairou District in Beijing, Dayan F, South Bank held a grand conference center, "Smart Technology for Education - 2008 Panasonic high-end projectors promotion." .The two-day "high-end 2008 Panasonic Projector" the General Assembly by the Matsushita Electric (China) hosted the East Central China Beijing Digital Technology Company Limited and Beijing Dongfang Electronic Technology Co., Ltd. to host the Central Plains. .Invited several well-known to the Beijing Institute of higher education institutions and is responsible for scores of participants, this understanding of the education sector and its high-end projector provides an opportunity for teaching applications ......>> details .Information Harman Kardon AVR-755 HD AV amplifier will be listed in January 2009 for the Harman Kardon Harman Kardon AV amplifiers senior market AVR-755, forthcoming in the January 2009 market. .AV machines, which is the world's first loaded with Dolby Volume technology, a breakthrough volume of this new solution to help solve the TV show annoyance caused by inconsistent loudness. .Dolby Volume technology to a whole new way to solve the volume of television entertainment programs the issue of consistency. .It sounds to imitate the way human perception, and ultimately eliminate the switching channels or programs arising from the different loudness, and will not produce sound broken ......>> details backgammon wireless TV / DVD exciting show recently moved ., the industry leader in the domestic player of backgammon backgammon new product --- Wireless TV / mobile DVD DL379KB debut! .Backgammon said, according to a timely launch of wireless TV Mobile DVD DL379KB, not only to meet anytime and anywhere consumers watch TV shows and movies, but also in the upcoming 2008 Beijing Olympic Games, to meet consumer demand for mobile watch the Olympic Games .. .>> More information appliance stores the economic downturn caused by the high-end audio sales fell by the economic downturn, many appliance stores in Goose City, high-end audio and other "luxury" isolated. .It is reported that some of the first three quarters of high-end audio store sales fell 30%. .Insiders expect the market for audio market Huizhou, a certain demand, rich levels of consumer strength will gradually improve as the economy can be released ....>> more information on flying private video song high car navigation systems: Volkswagen Touareg distinguished type .shake the world debut!.

PALM EXPO 2009 exhibition - the first sound booth.

May 28, 2009 in the morning, at its eighteenth session, "China international professional audio • lighting • musical instruments and technical exhibition" (PALM EXPO 2009) at the Beijing International Exhibition Center and the airport Grand opening. This exhibition exhibitors will reach more than 1100; exhibition area increased by 20%, to reach 85000 square meters. The number of exhibitors, exhibition area and the exhibition organizing history since most of the world-wide similar exhibition exhibition scale dominate. The exhibition will cover professional audio, professional lighting, stage machinery, conference systems, video systems, public address system, musical instruments, equipment and supplies, tens of thousands of new exhibits will be fully concentrated presentation of the latest achievements in the field. This exhibition is the first tone with new exciting debut, so stay tuned! Here is the audio gateway (audio160) reporter from the booth the scene back in the picture. PALM EXPO 2009 exhibition-the first sound booth

PALM EXPO 2009 exhibition-SHURE booth

May 28, 2009 in the morning, at its eighteenth session, "China international professional audio • lighting • musical instruments and technical exhibition" (PALM EXPO 2009) at the Beijing International Exhibition Center and the airport Grand opening. This exhibition exhibitors will reach more than 1100; exhibition area increased by 20%, to reach 85000 square meters. The number of exhibitors, exhibition area and the exhibition organizing history since most of the world-wide similar exhibition exhibition scale dominate. The exhibition will cover professional audio, professional lighting, stage machinery, conference systems, video systems, public address system, musical instruments, equipment and supplies, tens of thousands of new exhibits will be fully concentrated presentation of the latest achievements in the field. This exhibition debut with new exciting SHURE, so stay tuned! Here is the audio gateway (audio160) reporter from the booth the scene back in the picture. PALM EXPO 2009 exhibition-SHURE booth PALM EXPO 2009 exhibition-SHURE booth

Emily kwong audio companies participate in the Shanghai International music exhibition

2009 Prolight + Sound 2009 October 13 to 16 April at the Shanghai New International Expo Centre held successfully. The current table by the Shanghai International Exhibition Center and the Messe Frankfurt (HK) limited. China stage arts association, China Association of recording engineer, Shanghai municipal lighting Institute, the Shanghai Orchestra Association, Shanghai cultural entertainment in association with the trade associations and other units. The exhibition covers a wide range of exhibits, including professional lighting equipment, laser technology and theatrical special effects equipment, professional audio equipment, karaoke equipment, radio and audio recording equipment, DJ equipment, meeting facilities and public broadcasting systems, architectural lighting, audiovisual technology, LED, stage, Studio and large-scale project technology, sound effects, professional lighting and sound related computer hardware and software, professional lighting and sound related accessories, projection equipment, professional lighting and sound related services, associations and the media, and other audio products category. The exhibition's visitors come from all the trade show services, import and export agents, wholesalers/retailers, equipment rental companies, professional lighting and sound engineering design company, hotel/restaurant/bar, Club/Dance/Theatre/Concert Hall nightclub, radio/TV/film and TV production, related associations/media/publications, performances, professional tuner, exhibition/conference planning, municipal construction projects, etc. Sponsors for the same period also held seminars, industry forums, live demonstration activities, activities and rich show content. It is learnt that Emily kwong audio company, with its main push brand products to participate in this grand event. Emily kwong audio companies participate in the Shanghai International exhibition of pictures Emily kwong audio sound companies to participate in the Shanghai International exhibition of pictures Emily kwong audio sound companies to participate in the Shanghai International exhibition of pictures and sound

Ningbo acoustic sound of thunder and lightning sound equipment companies to participate in Shanghai International Exhibition.

2009 Shanghai International Exhibition of professional lighting and sound, in October 2009 from 13 to 16 at the Shanghai New International Expo Center a success. .View this event by the Shanghai Center for International Ltd and Messe Frankfurt (HK) Limited. .Society of Chinese stage art, sound engineer of China Association, the Shanghai Illuminating Engineering Society, Shanghai Performance Industry Association, Shanghai Industry Association, and other cultural and entertainment co. .The show exhibits cover a wide range, including professional lighting equipment, laser technology and stage special effects equipment, professional audio equipment, karaoke OK equipment, broadcasting and recording equipment, DJ / target = _blank> DJ equipment, meeting facilities and public address system, .Architectural lighting, audio-visual technology, LED, stage, studio and large-scale project technology, sound technology, professional lighting and sound-related computer hardware and software, professional lighting and related accessories, projection equipment, professional lighting and sound-related services, associations and media were .Audio Product Category. .The exhibition shows visitors from the industry Calvary service jobs, import and export agents, wholesalers / retailers, equipment rental companies, professional lighting and sound engineering design company, hotel / restaurant / bar, club / dance hall / nightclub theater / concert hall ., radio / television / film production, related associations / media / publications, performing groups, professional tuner, exhibition / conference planning, municipal construction projects. .Organizers also held technical exchanges over the same period, industry forums, live demonstrations and many other activities to enrich the exhibition contents. .It is reported that the sound of lightning audio equipment company in Ningbo, attended the event. .Ningbo acoustic sound of thunder and lightning sound equipment companies to participate in Shanghai International Exhibition pictures.

New-gain sound companies to participate in the Shanghai audio exhibition

2009 Prolight + Sound 2009 October 13 to 16 April at the Shanghai New International Expo Centre held successfully. The current table by the Shanghai International Exhibition Center and the Messe Frankfurt (HK) limited. China stage arts association, China Association of recording engineer, Shanghai municipal lighting Institute, the Shanghai Orchestra Association, Shanghai cultural entertainment in association with the trade associations and other units. The exhibition covers a wide range of exhibits, including professional lighting equipment, laser technology and theatrical special effects equipment, professional audio equipment, karaoke equipment, radio and audio recording equipment, DJ equipment, meeting facilities and public broadcasting systems, architectural lighting, audiovisual technology, LED, stage, Studio and large-scale project technology, sound effects, professional lighting and sound related computer hardware and software, professional lighting and sound related accessories, projection equipment, professional lighting and sound related services, associations and the media, and other audio products category. The exhibition's visitors come from all the trade show services, import and export agents, wholesalers/retailers, equipment rental companies, professional lighting and sound engineering design company, hotel/restaurant/bar, Club/Dance/Theatre/Concert Hall nightclub, radio/TV/film and TV production, related associations/media/publications, performances, professional tuner, exhibition/conference planning, municipal construction projects, etc. Sponsors for the same period also held seminars, industry forums, live demonstration activities, activities and rich show content. It is noted that the new surplus audio company, with its main push brand products to participate in this grand event. New-gain sound companies to participate in the Shanghai Exhibition pictures new surplus Hi-Fi audio company participate in the Shanghai Exhibition pictures new surplus Hi-Fi audio company participate in the Shanghai Exhibition pictures new surplus Hi-Fi audio company participate in the Shanghai Exhibition pictures new surplus Hi-Fi audio company participate in the Shanghai Exhibition pictures new surplus Hi-Fi audio company in Shanghai audio exhibition pictures

Time domain characteristics of loudspeaker systems

Time domain characteristics is a speaker system very important indicators, evaluation of the speaker system of the representations of specialized terms are associated, for example: transient response, layered, sharpness, acoustic positioning and so on. On time domain characteristics, electroacoustic industry engineers have a lot of ARTEMIS, but only qualitative analysis and certain assumptions, even very authoritative United States electro-acoustic measurement system LMS, no time domain characteristics of test functionality. With the rapid development of computer technology, now on time domain characteristics of the speaker system has been able to quantitative testing and analysis, now test system in the West of the United States of DAAS, LAUD, and Italy and some of our most domestic test instrument with. Temporal characteristics of the test in the test environment has high requirements, computer testing system in a free environment of test results only as a reference. Time domain characteristics mainly covered the following aspects of the content first, step response step response is often said of transient, refers to the speaker system-infeed signals or slow to follow, of course, should be the sooner the better, and weak signal will also agile response to. Speaker systems-transient-response indicators of good or bad and many factors relevant to the case of driver and frequency circuits and components, and even lines are on it. Transient characteristics of a good speaker system "dynamic wind, static such as clock, accurately faithful reflect momentary change audio signal, the pursuit of fever frenzy" exhaustive "worlds will now" is actually a pair of speakers transient characteristics of a pursuit. Transient is speed, speed of factors not only speaker systems, audio sources are equally important, amplifier; silver wire and copper on audio-current transfer speed also varies considerably (not just the resistance values are different so simple). As copper and brass wire (copper alloy), of copper wire (pure copper wire), the number N of copper wire (n is the first English 9 letters, such as 6N represent copper content 99.9999%), Crystal copper wire, single wire, stranded wire, and even more shares how special stranded wire, variety, long tale. All speed and tone on the (speed will decide the timbre of the main ingredients), danji to Stoner speed faster, from analog to a digital circuit speed and fast, silver line speed not catch is not inner resistance of carbon fiber cables, cable transmission, of course, be slower than fiber, it-shoot faster to what extent? digital circuit very advanced today someone stood up and said: "digital taste of baldly, rustic danji fun much (danji slower). ", Great CEOs said, sound really good fun. For equipment fast or slow this problem actually did not dispute the need, as long as you like it was good. But for a speaker system is concerned, I personally prefer fast some of that may be a "occupational diseases", more emphasis on testing indicators, on a small number of people agree that the music taste very strong "but time domain characteristics not good speaker system. This so-called music taste very strong thing may listen to a few slow song some special feeling, but overall performance too got off to a question mark on it. Music Unlimited, not simple in what strings, percussion, brass, lead vocal and orchestral ... ... The world's peoples have their own music, what is the "music taste"? I think honestly do of electro-acoustic indicators, a faithful restoration-infeed signal, a signal hurry off sound, no signal immediately shut up, without personality is good. Transient effect speaker system is the leading cause of damping, it includes driver's electric damper and damping mechanical, frequency network of acoustic damping, box, even communication medium damping of damping (experienced readers might have such a feeling, a single set of equipment in the sunny and rainy day air humidity different State sound will change a little). Low-impedance speaker system is the international popular practices, analysis of many internationally renowned speaker system, it is not difficult to see the masters are to improve the speaker system of the transient response and great article to reduce damping. Denmark's wafer speaker name factory has several new units have adopted copper shorting ring structure, its intention is to improve the range of high-frequency impedance, in fact also reduce electric damper, scallops warheads that treble unit (forgot the model, the little whirlwind in high-end products used) is one of the representatives; PMC famous Octopus bass unit selection PU material do hanging edge University colours to reduce damping, readers and friends who are interested to hear that the low frequency of transient response is a very, very fun to listen to drum; rain early eye of after several name box designed to short down-tube (only about 2cm), effectively reduces resistance, access to the excellent transient response and, of course, unit low damping material cone loudspeaker with PP, low damping butyl rubber hanging side also go a long way, readers can also go to listen to the original high transient response of the speaker system is so fidelity and vivid. For high-quality, crossover network selection of capacitors, aim low loss and high speeds, air core inductor to reduce electric damper, these are improved transient response means that the speaker system in the bass range frequency response guaranteed of even less inductance, and is express, its results are greatly improved transient response, of which there are the representatives of the music-rich 2188, BMB, Zhang Bai-LEUNG has a product it is express, must have good bass, unfortunately not respectful listening. Effect of transient response of many factors, such as driver's supported tablets, magnetic circuit design, the sound-absorbing materials such as tank, it is difficult to disagree more.

The compression method to use?

As China in recent years, increasing people's living standards, culture and entertainment facilities in the continuous development of the head from moving music with its melodies, dreamy style, attracting a large number of young people. .Discos have mushroomed in the vast land! As discos large dynamic, large loudness of playback, so in order to protect the amplifier and speakers are generally limited in its control to reduce the pressure in front of music dynamics, limiting their output .level, which can effectively protect the safety of electro-acoustic equipment. .However, if the debug properly, pressure limit does not work, power amplifier and speakers still too large due to the impact of transient signals and damaged, or because of excessive compression reduces the dynamic range of music should be so weak voice dry! Now .far as discos compressor issues in the use of all of the readers to use it! 1. compression ratio (Ratio) of the set discos set if the compression ratio is too small, there is no trace of compression; .If the compression ratio is set too large, it will cause a narrow dynamic range of music, sound, dry and tasteless. .PA in the disco hall used as a compressor, generally around the compression ratio set at 3:1, when used as a limiter, set at 8:1 compression ratio should be about. To ensure the expansion of compressed music signal .sound system's dynamic range, to avoid overload distortion, to ensure that the disco dance music, shocking. .2. Threshold (Threshoid) adjustment of the threshold adjustment is essential, which determines the pressure limit to what power usually comes into play. The correct adjustment methods are: the threshold adjustment to the minimum position, the tuning .station at maximum volume (volume increase must be confirmed after the compression ratio greater than 2:1, then, appeared to start the input signal compression, will not cause the phenomenon of the output signal is too strong), then slowly raise the threshold .value. At this time a large volume of slowly changing, when a large volume to a certain extent (has reached the required sound pressure level or the maximum rated power amplifier and speakers), set the threshold to stop upgrading! 3. start time ( .Attack) to adjust the start time of the adjustment is mainly to consider the characteristics of music. .If the start-up time too fast, shaking his head to a certain extent affect the dynamic head of music and intensity of sound; if the start time is too slow, would affect the extent and nature of music moment characteristics. .Therefore, the start time should be selected in about 40ms. .4. Recovery time (Release) to adjust the general recovery time should be slower than the compression time to ensure that music does not produce a sense of students jumping, if the recovery time is too long will affect the selection of the next normal music signal. .General discos in the normal play circumstances, the recovery time is about 500ms should be selected. .The rhythm of the music shaking his head at different speeds, so the rhythm in the opening shot of about 140 per minute can be a little longer, making the rhythm of about 155 per minute may be shorter than some of the specific characteristics of the music can set to make reasonable adjustments. .Comprehensive statement to sum up the above, the compression ratio settings: Protection 6-10, the effect is 2-4; start level is set: Do not let the red amplifier, generally between -10 to +6; start time setting: for bass in the .3, for tenor in 12 points for the treble at 9 o'clock, 12-point general-purpose recovery time settings: for bass 9:00, for 12 points Alto, for treble 3:00, general-purpose 12-point output output settings..

Bosch's new half-directivity speakers

Bosch-directivity speakers is a simple installation of innovative speakers, have always consistent superior sound quality, make sure that the paging and emergency call applications provide excellent background music reproduction effect and excellent speech intelligibility. The speaker has superior open angle and high sound pressure level, coverage can be at least 600 square meters in area, which makes it very suitable for ceiling high indoor places, such as warehouses, transportation hubs and exhibition halls, supermarkets and a swimming pool, etc. This power of hoisting the speakers sound effect using state-of-the-art technology, sophisticated appearance, an extremely attractive price/performance ratio. Bosch-directivity speakers have a very powerful feature, even the most demanding indoor environment (including dry and wet application), it also can deal with ease. The installer can use loop wiring tools and optional safety rope and significantly speed up the installation speed. If the speakers need to be fixed installation, you can use the metal hanger Kit. Bosch-directivity speakers through several rigorous testing to ensure that in the extreme conditions still run correctly. It is not only in the EVAC standards and meet or exceed the voice alarm environment of all the necessary criteria (IEC60849 and BS 5839 part 8). In order to better protect the speakers, it even can install optional monitoring board — this is a unique innovation Bosch. As Bosch in technical innovation, Bosch-directivity speakers in structural innovation is equally impressive. Bosch-directivity speakers through comprehensive optimizer that could produce superior voice and music reproduction and exquisite sculpt its technical innovation as well. The use of advanced filtering technologies and 14 loudspeakers driven unit unique combination, Bosch has developed powerful speakers, can provide exceptional voice intelligibility and high-quality music reproduction effect, even in the edge coverage. Beautiful and elegant appearance, easy and convenient, single point of installation, which makes this speaker is applicable to modern application environment, it also applies to classical nostalgic application environment. Durable casing can produce first-rate subwoofer reproduces the effect, while eliminating unnecessary resonance phenomena — thanks to its superior acoustic design. This speaker easy installation, easy maintenance, wide coverage, the elegant appearance of absolutely, all of which greatly reduces the cost of ownership with speakers.

PS3 fully supports DTS-HD High Definition surround-sound standards.

All PS3 price is the cheapest Blu-ray machine, and you can play games Kandie function, its reading and operation of a temporary Department of the fastest and feature upgrades prospects are promising, the most important images of a powerful engine, the output of the picture .quality and not lose a number of intermediate machines, even if the play had been to 160-inch high-definition projectors, are still felt sharp picture ....

Fostex PM0.4 za a $ 2200 on sale only

Fostex PM0.4 za end limited promotions are now available at the beginning of December, limited promotional FostexPM0.4 promotional period a $ 2200 PM0.4 after-sales, only limited, purchasing please. Fostex PM0.4 za Fostex PM0.4 lines PMMKII series za induction user market requirements and follow hygiene 4 inch entry za. Applied to the top level of professional-level sound mixer, audio recording studio listening devices, and portable listening. Fostex has been pursuing the essence of pure listening, do away with the word, the efforts of glitz and make high performance-cost ratio approaching new standard za! now December limited promotional FostexPM0.4, promotional period a PM0. 4 only $ 2200 sales limited, purchasing please contact with dry rhyme with introduction: small desktop FostexPM0.4 Professional-level continued listening PM0.4 rich PM series from 4 "to 8" subwoofer unit product line. PM0。 4 naturally recommended for have a good sound quality for Desktop-listens to select one of the suits from professional-grade sound mixer top Studio monitor, audio devices, and portable listening. Main performance: · specially designed 4 "bass unit and UFLC0.65" soft dome type treble head · high efficiency dual power amplifier for driving high-frequency, low frequency and the 18W. · separate left and right speaker amplifier · beautiful and rich gloss black front panels, suitable for shielding · steering and video monitor to match applications

PALM EXPO 2009 exhibition-CTAL booth

May 28, 2009 in the morning, at its eighteenth session, "China international professional audio • lighting • musical instruments and technical exhibition" (PALM EXPO 2009) at the Beijing International Exhibition Center and the airport Grand opening. This exhibition exhibitors will reach more than 1100; exhibition area increased by 20%, to reach 85000 square meters. The number of exhibitors, exhibition area and the exhibition organizing history since most of the world-wide similar exhibition exhibition scale dominate. The exhibition will cover professional audio, professional lighting, stage machinery, conference systems, video systems, public address system, musical instruments, equipment and supplies, tens of thousands of new exhibits will be fully concentrated presentation of the latest achievements in the field. This exhibition debut with new exciting CTAL, so stay tuned! Here is the audio gateway (audio160) reporter from the booth the scene back in the picture. PALM EXPO 2009 exhibition-in-PALM EXPO 2009 CTAL booth exhibition-CTAL booth PALM EXPO 2009 exhibition-CTAL booth

The first song for the EAW exclusive distributor in China!.

May 27, Audio Co., Ltd. Shenzhen, the first song (first song) held a press conference in Beijing. .At the meeting, the United States solemnly declare EAW speaker brand: its first song in mainland China, Hong Kong and Macao exclusive distributor. .The statement said: In the past few months, in China there are more American EAW speaker brand imitation, these counterfeit products will not achieve the high quality and genuine EAW sound level. .EAW solemnly declare, in order to protect the interests of consumers to purchase genuine EAW Please only authorized dealer - the first song to buy. .The first song, there are strict in the sales of sales system, EAW products are appropriate for each serial number, and provide after sales service. .Conference site at the first song as the EAW brand distributor ceremony. .March 2008, Shenzhen City, the U.S. first song sound EAW Professional Audio Co., Ltd. in Mainland China, Hong Kong, Macau, the exclusive distributor. .Another News: EAW Vice President, Technical Director Kenton Forsythe recently renounced the use of "Forsythe Audio System" brand, and said, EAW all authorized parts suppliers are not involved in any audio system with Forsythe brand production activities..

Di Su Audio participated in the Shanghai Exhibition of professional lighting and sound.

2009 Shanghai International Exhibition of professional lighting and sound, in October 2009 from 13 to 16 at the Shanghai New International Expo Center a success. .View this event by the Shanghai Center for International Ltd and Messe Frankfurt (HK) Limited. .Society of Chinese stage art, sound engineer of China Association, the Shanghai Illuminating Engineering Society, Shanghai Performance Industry Association, Shanghai Industry Association, and other cultural and entertainment co. .The show exhibits cover a wide range, including professional lighting equipment, laser technology and stage special effects equipment, professional audio equipment, karaoke OK equipment, broadcasting and recording equipment, DJ equipment, meeting facilities and public broadcasting systems, building lighting, audio-visual technology, .LED, stage, studio and large-scale project technology, sound technology, professional lighting and sound-related computer hardware and software, professional lighting and related accessories, projection equipment, professional lighting and sound-related services, associations and media, audio product categories. .The exhibition shows visitors from the industry Calvary service jobs, import and export agents, wholesalers / retailers, equipment rental companies, professional lighting and sound engineering design company, hotel / restaurant / bar, club / dance hall / nightclub theater / concert hall ., radio / television / film production, related associations / media / publications, performing groups, professional tuner, exhibition / conference planning, municipal construction projects. .Organizers also held technical exchanges over the same period, industry forums, live demonstrations and many other activities to enrich the exhibition contents. .It is reported that Di Su sound companies, the main push to bring its brand to participate in the event. .Di Su professional audio sound companies to participate in Shanghai Exhibition picture Di Su professional audio sound companies to participate in Shanghai Exhibition picture Di Su professional audio sound companies to participate in Shanghai Exhibition Picture Di Su professional audio sound companies to participate in Shanghai Exhibition Picture Di Su professional audio sound companies to participate in Shanghai Exhibition pictures .Di Su professional audio sound companies to participate in Shanghai Exhibition picture Di Su professional audio sound companies to participate in Shanghai Exhibition picture Di Su professional audio sound companies to participate in Shanghai Exhibition pictures.

Mei Ke audio companies to participate in the Shanghai Exhibition of pro audio

2009 Prolight + Sound 2009 October 13 to 16 April at the Shanghai New International Expo Centre held successfully. The current table by the Shanghai International Exhibition Center and the Messe Frankfurt (HK) limited. China stage arts association, China Association of recording engineer, Shanghai municipal lighting Institute, the Shanghai Orchestra Association, Shanghai cultural entertainment in association with the trade associations and other units. The exhibition covers a wide range of exhibits, including professional lighting equipment, laser technology and theatrical special effects equipment, professional audio equipment, karaoke equipment, radio and audio recording equipment, DJ equipment, meeting facilities and public broadcasting systems, architectural lighting, audiovisual technology, LED, stage, Studio and large-scale project technology, sound effects, professional lighting and sound related computer hardware and software, professional lighting and sound related accessories, projection equipment, professional lighting and sound related services, associations and the media, and other audio products category. The exhibition's visitors come from all the trade show services, import and export agents, wholesalers/retailers, equipment rental companies, professional lighting and sound engineering design company, hotel/restaurant/bar, Club/Dance/Theatre/Concert Hall nightclub, radio/TV/film and TV production, related associations/media/publications, performances, professional tuner, exhibition/conference planning, municipal construction projects, etc. Sponsors for the same period also held seminars, industry forums, live demonstration activities, activities and rich show content. It is learned that the American audio company, carrying Ko s main push brand products to participate in this grand event. Mei Ke audio companies to participate in the Shanghai Exhibition pictures-American professional audio audio company in Shanghai Ke professional audio show pictures and sound companies to participate in the Shanghai Ke professional audio show pictures and sound companies to participate in the Shanghai Ke professional audio exhibition pictures

Spectral sound companies to participate in the Shanghai Exhibition of pro audio

2009 Prolight + Sound 2009 October 13 to 16 April at the Shanghai New International Expo Centre held successfully. The current table by the Shanghai International Exhibition Center and the Messe Frankfurt (HK) limited. China stage arts association, China Association of recording engineer, Shanghai municipal lighting Institute, the Shanghai Orchestra Association, Shanghai cultural entertainment in association with the trade associations and other units. The exhibition covers a wide range of exhibits, including professional lighting equipment, laser technology and theatrical special effects equipment, professional audio equipment, karaoke equipment, radio and audio recording equipment, DJ equipment, meeting facilities and public broadcasting systems, architectural lighting, audiovisual technology, LED, stage, Studio and large-scale project technology, sound effects, professional lighting and sound related computer hardware and software, professional lighting and sound related accessories, projection equipment, professional lighting and sound related services, associations and the media, and other audio products category. The exhibition's visitors come from all the trade show services, import and export agents, wholesalers/retailers, equipment rental companies, professional lighting and sound engineering design company, hotel/restaurant/bar, Club/Dance/Theatre/Concert Hall nightclub, radio/TV/film and TV production, related associations/media/publications, performances, professional tuner, exhibition/conference planning, municipal construction projects, etc. Sponsors for the same period also held seminars, industry forums, live demonstration activities, activities and rich show content. It is learnt that the spectral sound company, with its main push brand products to participate in this grand event. Spectral sound companies to participate in the Shanghai Exhibition picture pro audio spectrum sound companies to participate in the Shanghai Exhibition picture pro audio spectrum sound companies to participate in the Shanghai Exhibition picture pro audio spectrum sound companies to participate in the Shanghai professional audio exhibition pictures

What is the pressure limit of the startup time?.

Start time ATTACK TIME, this function is to determine when the compressor input signal is detected higher than the starting level after the compressor to work to the time required, the shorter the time set, the faster the compression of the signal but the signal dynamic .the greater the impact, showing, set to compare the quick start, when the compressor to start working soon head to the bass sound to squeeze out, feel the bass become scattered. .Slow start-up time, the compressor on the signal response was relatively slow, but the damage is relatively small signal dynamic. .Start-up time impact of speed on the low-frequency signal is relatively large, too fast can cause divergence bass, so if there is no sense of the capacity of high frequency in case of problems, the appropriate time to start slowing down a powerful bass to get clear, I generally put this .knob set at 3 o'clock position. .If for high frequency, I generally set in the 9 o'clock position. .If you compare the ear works, you can tune Do not listen to side, put a full bass, clear CD promoted large mixer signal to the compressor starts, and then slowly turn clockwise from fastest to slowest start time of the knob, when the bass .become a strong and clear voice, when on it..

Media matrix features

Central control system MediaMatrix (media matrix) and system software package is a complete sound system's main control centre, the control system using DSP processor, mixer, equalizer, wiring, compressor, delay, divider, Distributor, etc., signal processing, testing, and other peripheral equipment set, the output from the audio sources were completed to the amplifier input all your work, and is soft jumper technology, can be arbitrary unlimited combination of outstanding characteristics are: (1), functional changes, adjustments and facilitate conventional analogue electronic audio equipment combination modes are fixed and difficult to apply in accordance with the outside world is constantly changing. You can change the time too long, and professional and technical personnel to assist because control device widely distributed, users control space, operating time, the reaction is slow, costly, burdensome regulation. While the media matrix system with only a computer monitor that displays the friendly work interface lets users focus, easy operation (by only a mouse and keyboard). In the preset only need to press a key, you can make system conversions and regulation. (2), adapt wide when analog electronic audio peripheral equipment once adjusted, it is not easy in use and then change. Therefore, each time the activities of the change, the customer's requirements, all require the operator to spend a lot of time and effort to make adjustments, sometimes because of conditions limiting or even difficult to complete. While the design of the selected device is controlled by the computer, the changes are just a mouse that can be completed, and the storage capacity. The last number of years ago, or even still preserves the parameters, so it is adapt to customer needs. Regardless of any person, any program, any activity, as long as the original value stored well, how many years later still can recover the original style, save time, effort, adapt wide. (3), precision high, signal to noise ratio high due to the use of the digital bus and computer control, the control precision is much higher than ordinary analog audio equipment, the control parameters of high accuracy, can make all kinds of work combining sound reinforcement, all data are in the best location. Make the audio sound reproduction equipment and program sources (sources) to achieve the best sound effects. And use DSP only A/D and D/A conversion, simply do not exist in general device interconnection issues, so very little opportunity to introduce noise, not only connection has become so easily accessible, and signal to noise ratio is much higher. (4), the connection is convenient, consistent, and equipment transferred between low failure rate of a variety of devices in the system with computer operation, DSP software jumper interconnect, save a lot of external links, not only to lower system costs, and dramatically improve system stability. At the same time, the DSP device are all digital, all in the same high level of quality, consistency and complementarity. There is no general analog electronic audio equipment, due to technical problems, the incoming channel level, funding issues, product issues, and many other factors, caused system peripheral equipment performance is mixed, with a somewhat reasonable, throughout the system bottlenecks, all device functions of the impact, waste of investment. (5), small volume, light weight, less digital computerized equipment, small volume, light weight, so the required space is smaller, you can make the control room space for larger, easy operation and cooling ventilation, easy maintenance. (6), the technology content is high, the low rate of damage, human factors interfering with the smaller the master control system by the computer, install Windows by displaying the interface and control device that is not directly managed by staff, man-made damage rate is reduced to a minimum. Than analog devices can be longer effectively maintain optimal working condition. The system can be divided into four control grading, different levels of technical personnel and operators through their password, open a different control level, for their own purview of regulation. (7), have a good advanced technology, upgrade, update the easy, convenient for the device's extended control by software control, so in the future, you can update the software upgrade mode, you can keep for a long time technology. In addition, many new uses of the future is with social development, today it is difficult to predict. Therefore, the use of the system of another great benefit is in addition to these upgrade easier, Channel interface, you can with the development of the society, application requirements change from software upgrades to improve, improve, and add new features. The equipment in this area of freedom and redundancy are larger, but not necessarily the same as the analog devices, repeatedly spend large sums of money to purchase new products, but also the processing of used equipment.

ADM concept digital mixing console (figure)

ADM is only a concept, it attempts to break the monotony of a traditional mixing console, use the graphics signal audio information can let user know exactly what, and what to do.

CROWN Crown launched a new series of power amplifiers LPS.

CROWN Crown corporation is a manufacturer of professional audio equipment, and its main products include power amplifiers and microphones and other audio products. .Especially in the field of professional power amplifier deep knowledge. .Recently, CROWN launched a new design of the LPS 2008 series amplifier, the series includes LPS-800, LPS-1500, LPS-2500 three product models. .CROWNLPS Series crown power amplifier power amplifier uphold the traditional advantages and reliability, reduce weight, compact size designed to enhance the applicability of LPS amplifier, both as a touring or fixed installation system configuration, system configuration, all reflect it in the same .the superiority of the product. .Configured with high-performance thermal design efficient fans, the use of security provided. .Standard 2U height design saves closet space for the user. .CROWN LPS LPS series of built-in power amplifier limiter to protect the tweeter to be burned, and when the feedback caused by acoustic feedback, the general design of the amplifier output will suddenly jump in and burned tweeter. .LPS of the built-in power limiter limits the output power, reducing the failure caused by howling. .Kara OK rooms in many construction defects in the sound design has easily lead to the feedback whistle, LPS amplifier will be of much help. .Design of the front panel control and precise level of the four LED indicator shows working status, including the various control switches and rear panel input / output terminal, and internal protection circuit design, power amplifier including output current limiting, DC protection, overheating .and short circuit protection fuse and so on. .All of these features are designed using high quality materials to ensure product quality. .All three amplifiers are used LPS solid all steel chassis, and configured so as to avoid over-efficient fan forced heat buildup. .The front panel is equipped with two precise level control knob, a power switch and four LED lights, respectively, showing the channel clipping, power and fault conditions. .After the panel includes two balanced XLR input and output terminals is a professional Speakon ® sockets and fixed common terminal installed. .CrownAudio Audio Product Marketing Manager, Mr. BobLichty said: "LPS Series amplifier is very suitable for the environment need to work long hours, for example, the use of DJ and bands. Although its price is not expensive, but the performance and use, and there is no discount." Within the .Purchase power limiter to protect the tweeter unit. .Output power and frequency response curves match with JBL speakers. .Standard 2U height design, rugged steel enclosure, fashion innovation and compact and reliable. .Set [dual-channel] or [single bridge] conversion mode select dial file, suitable for different requirements, so that operation more efficient, simple and secure. .Sophisticated and intuitive signal and clipping LED display, but also provide more reliable fault diagnosis and protection, current limiting, DC output, overload and overheating protection. .Technical Specification Performance: Frequency Response (1W): 40Hz-20kHz, +0 /-3dB total harmonic distortion (THD): intermodulation distortion (IMD) 60Hz and 7kHz4: 1, full rated output to-30dB: slew rate: LPS .-800 -> 20V/us LPS-1500 -> 23V/us LPS-2500 -> 27V/us voltage gain: LPS-800 - 32dB LPS-1500 - 32dB LPS-2500 - 34dB attenuation factors ( .8 ohms), 10Hz-400Hz:> 300 Signal to Noise Ratio (below rated power, 20Hz-20kHz, A-weighted):> 100dB crosstalk between channels (below rated power): @ 1kHz-76dB / @ 20kHz58dB 4 ohm rated .power input sensitivity: 1.25V Input impedance (balanced / unbalanced): 20k ohm / 10k ohm connectors to control and monitor the input connectors: each channel of a balanced XLR output connector: Speakon ® connectors and a per channel .fader on the front panel binding control: power on / off, gain control for each channel after a control panel: output mode switch: stereo (dual channel) parallel or bridged power indicator: a blue LED indicator signal indicator .: a green LED indicator per channel peak indicators: a red LED indicator per channel Protection Indicator: Red LED indicator, one per channel, indicating channel closure construction: Protection: short circuit, no load, open / .Close cut, RF interference protection, stability, response or load mismatch. .Ventilation: front and rear air flow cooling: built-in natural cold heat sink, cooling fan, variable-speed control Overheat protection Dimensions (WxHxD): 482mmx89mmx386mm NW / GW: LPS-800 (9.5kg/10.9kg) LPS-1500 (10.4kg / .11.8kg) LPS-2500 (13.5kg/14.9kg).