Several speakers sound way.

At present, the vast majority of speakers were still use traditional cone single voice, before and after the campaign more academic, these speakers called electric (Electrokinetic Dynamic) or moving coil (Moving Coil). Early in 1977 Germany Siemens Erenst Vemer get moving coil Horn's patent, but the vacuum tube to a nine and seven years before the official 0, but Edison's first player is directly driven diaphragm needle and then zoom in by Horn, Siemens sound patent has not been used. A 1920 United States singular company Chester Rice and Edward Kerrog also Bell p-Edison The development of the first degree G.Hokuto out practical moving coil Horn, 70 years, with the exception of material constant improvement, you are credited to the loudspeaker technology really progress? here are some common Horn sound manner: first, the moving coil. Basic principles from the law left the Buddha-ming, a current of line and the line of vertical drop into the magnetic north and South poles, the line will be the magnetic and electric current the interaction and moves to a diaphragm attachment in this line, along with the current change to the diaphragm creates the movement before and after. Currently more than 90 percent of the cone cells are moving coil design. Second, the electromagnetic type. In a u-shaped Magnet Middle-erecting removable Tsam iron plates (armature), when current flows through the coil magnetic armature will be generated with the magnet, and suction repulsion phenomenon driven diaphragm movement at the same time. This design inexpensive but ineffective, so most used in telephone handset and small headphones. Third, the inductive. And similar to the electromagnetic theory, however, which the magnet armatures double two voice coil and asymmetry, when the signal current through two armature for different flux will be squashed and movement. And electromagnetic is different is the inductance is able to regenerate a lower frequency, but efficiency is very low. Fourth, the static type. The basic principle is the Coulomb (Coulomb) law, usually plastic quality of diaphragm with aluminum and other inductive material vacuum evaporation process, placing two diaphragm face-to-face, when one tablet plus is current when another piece of high pressure will induction out small current, with one another to attract repulsion to promote air can produce sound. Electrostatic unit due to the quality of light and vibration scattered small, so it is easy to be clear and transparent in the treble, the bass power has not caught, but its efficiency is not high, the use of direct current, former and easily gather dust. Currently, manufacturers have such Martin-Logan successfully developed static and dynamic hybrid loudspeaker, a solution to the static problem of insufficient volume bass, the headphones on the application of static type is also very broad. 5. flat type. The earliest by Japan SONY developed the design of the voice coil design is still a moving coil as its theme, but will be replaced by cone diaphragm honeycomb flat diaphragm, because few people devoid of effect, the characteristics better, but efficiency is low. 6. Ribbon type. No traditional voice coil design, the diaphragm is a very thin metal, current directly into the road of the vibration of the pronunciation. Thanks to its diaphragm is the quality of the voice coil, so it is very light, excellent transient response, high-frequency response and very good. However Ribbon-Horn of efficiency and low impedance on expanding machine has been a great challenge, Apogee can be represented. Another way is to have a voice coil, but the voice coil direct printing on plastic sheets, which can solve the problem of some low-impedance, Magnepang such design leader. VII. Horn type. Diaphragm promote lies on the trumpet, and work at the bottom of the air, because the sound is not spread so very efficient, but because of the shape and length of the Horn will affect the tone, you want to replay the low frequency nor too easy, now mostly used in giant PA system or treble monomer, United States Klipsch is the time-honored Horn loudspeaker manufacturer. VIII. other there are sea ear doctor in 1973 developed Ribbon-style design, known as sea ear trumpet, theoretically very excellent, Taiwan users are very rare. Piezoelectric is the use of electric materials, isobaric plus voltage to stretch or shrink the pronunciation of design, Pioneer has high polymer modified piezoelectric design, used in their high-pitched monomer. Ion Horn (Ion) is the use of high-voltage discharge so that the air becomes live quality only, to AC voltage after these free of charged molecules will be due to vibration and audible, currently can only be used in high frequency more monomer. Philips has developed active feedback-Horn (MFB), horn is proactive feedback circuit, can significantly reduce distortion. These designs are currently not dominant, we have the opportunity to explore.