On the speakers of the divider

Speaker of the divider, the majority as passive power divider. Often referred to as Butterworth divider. It's transient response, and a flat frequency response curve. However the first self-made divider is encountered crossover point. In fact, as long as the speaker unit selected, crossover point take 2--4KHz, it is possible to draw a smooth curve to qualified test. Crossover points higher. High-frequency comparisons. Overall timbre thin. Crossover points of low point, replay sound more solid. Of course, in treble unit performance is poor, the crossover point from a high point, treble unit safety comes first, the treble unit too much into the low-frequency, it is very likely to burn. Instead, too many low-frequency unit into the high-frequency, low frequency unit will not be burned, but split vibration, sound quality. Crossover points, followed by question is divider "phase". We all know, the divider, capacitors, inductors, capacitors, capacitor current voltage exceeding 90 °, and through the inductor current to voltage hysteresis 90 °, for an order (6db/oct) and the third order (18db/oct) Butterworth filter, they are very near the crossover point within the lag phase in advance and be able to offset each other. You can make the pass-band phase shift happens to 0. So the first-and third-order divider, bass speakers can be connected. For the fourth-order (24db/oct), it has better phase characteristics, the crossover point for 360 ° phase difference, i.e. the low-pass frequency point network phase is the same. So high it is with the woofer. For second-order (12db/oct) divider, the crossover point 180 ° phase difference. We must be reversed-phase high bass speaker connection. Of course, some speakers front made of bevel, also is to correction phase. On so many phase problems, just hope that the high point of the woofer frequency crossover, you can get a relatively flat response curve. Otherwise the crossover point curve undulating rugged, is bound to affect the sound quality, distortion and many other issues. Next is the divider computational problems, we take a look at the most simple first order frequency divider (high-pass a capacitance, low pass an inductance, figure) 6db/oct-3db landing point cross, 6db/oct — is the slope that represents attenuation per octaves down 6db (a divider its frequency for the treble unit in 4KHz 2KHz Department relative to the whole of the frequency response curve dropped by 6 DB and bass unit in 8KHz Department also declined by 6 DB). -3db landing point cross-power allocation, the conversion rate that is 3db-1/2 power. (If in the crossover point of bass speakers work is bound in full power frequency point near the sound special ring. So try to make the crossover point of bass Horn all share half power) from the above concept, we can think so: when Qualcomm capacitor capacitance = lowpass sense of inductance and resistance are equal to the loudspeaker impedance Z, you meet the above frequency requirements. Thus far: Xc (Qualcomm capacitance) = XL (low pass gankang) = Z (speaker impedance). The resulting equation available: Xc = 1/2 to π f ZC = C = 1/2 to π f Z (1) XL = 2 π f L = ZL = Z/2 π-f (2) as a crossover point in f, (1) (2)-calculated values of capacitance and low inductance-Qualcomm. Other order formula can deduce from this basic formula. However, when the speaker mount housing, due to various reasons, it is not only near the crossover point produces peak and Valley, in the other frequency point will have peak and Valley. (Element itself also the frequency response curve gently) it will use "RLC circuit to correct". We all know, when the LC series, its resonant frequency Fo Department impedance minimum. LC parallel, maximum Fo Department impedance. Take advantage of it this way, we put the tandem of LC (frequency to the frequency response curve peak point f) parallel to the speakers at both ends of the triage function. The speakers in the audio current decrease f Department, which reduces the output of the f, so that the frequency response curve peak point "flattening". In LC series of resistors in R, you can adjust the peak point of landing. Similarly, if the LC series parallel circuit in the speaker circuit, Volt, similarly to peak-point voltage. In fact, it's like industry heat treatment quenching after deformation, ways to get it straight. Having said that, please think about, if we have a unified formula, as far as this does not sound of speaker features the same, what else?, in fact, the calculation formula is only one basis, on this basis, according to the understanding of the music, on the whole of the frequency response curve for a certain amount of retouching. Furthermore, whether a speaker its frequency response curve must be flattened as a horizontal line as it sound good? effect by BBC classic curve (in the Office of a micro-3.8KHz concave ramp), many United Kingdom case its curve often fluctuations is large, it sounds nice, very large numbers of enthusiasts alike. Whereas Germany box because of the rigorous, Germanic peoples often straight curve. Sometimes it is a straight (divider RLC circuit in particularly high absorption). Germany-box fresh, various music details clearly accountable, resistance to listen. Long sounds to distinguish it. But Germany has a lot of people box does not like to hear, I personally prefer the Italy of the "Blaster", he not only violin-making process for the speaker, and Italy's Opera is famous. They put on music of understanding on the interpretation of the speaker. "PA" speaker sounds very beautiful, so long refused to leave. "PA" speaker's founder, Mr. Franco Serblin once said "all the design creation, should refer to the nature of philosophy, not to be cold numbers, data limits the authoring space. "Why our neighbor Toyo technology so advanced, but making a decent speaker? provoking! here, I have to go back to the very words, for those of us in terms of primary enthusiasts? a word" copy ", and now there are a variety of magazines like Proac Response 2.5, Proac Reponse One1s, imitates the Crown limpa ... Is the power amplifier, imitation, imitation K voiceRELL, imitation, imitation Pass MARK Levision are not copied? but here to draw attention: "copy" to copy the original. Some lines after some processing, the "icing on the cake," but the "snake" even if the manufacturers to provide the physical line, and there are differences. It is best to real energy anatomy. As in the case of actual shape, size, thickness, trumpet and down-hole, relative positions, and so on. Even the sound-absorbing material, placement, place the volume, which can reduce debugging problems. Final report on listening. In fact, the sound is very difficult to describe in words. Many enthusiasts with a pair of speakers, or a power amplifier. Often describes how sound how good, in fact, this is very subjective. Write listen, I think having to describe how the sound. If you want to write a speaker listening address. You just have to write out what sources, what power amplifier, a comparison with what speakers (AB) in what kind of listening environments, how many people listen to, how many people say that A case well, how many people say B box. Finally able to briefly explain that A box for good reason, says B box for good reason. Of course, you must use the matching accessories are more familiar with and have the opportunity to hear. If you use a better description of wire rod, wire brand. Here also to make the point, have the opportunity to invite people to listen to the best single, it doesn't matter whether the enthusiasts. To believe that the "fear of impotent afraid than goods," this sentence Hunanese. I tried several times, most people are able to recognize good or bad. For non-geeks, he or she does not know which is the case, the use of plant producing what. This sounds rather more just. If enthusiasts get together to listen to the best use of blind listening method.