The sound of the speakers is closely related to the sound of their voices.

By the drive unit, loudspeaker sound box constitute basic speaker. The design is of course important, materials used to sound also has close relationship, if the change in which a portion of the material the rest remain unchanged, sound will have different and this difference may very obvious, some love it yourself enthusiasts to try different material to replace the original materials, such as sound divider for "tonic level capacitance or fever line replaced the original wiring, some make quality improvement, also some damage to the original sound balance. Parts influences the quality of the sound is an elusive thing, do you think replacing the tonic parts will improve the sound, sometimes, on the contrary, the original several parts match or sound balance but better, this may be the design has been carefully test to reach the ideal part of the match. Enthusiasts can make their own test, but so will lose the agents with the service, you put any changes to the original parts, the problem, of course, by your own responsible.

Drive unit

Drive unit, commonly known as speaker. In structural materials have several points worthy of special attention, type electric horn diaphragm (and bass loudspeaker diaphragm or sound basin) material there are several, paper diaphragm has a long history, its light and with proper damping characteristics, to the bird is still more than the factory adhere to the, but paper vibration film easy to damp wet rotten or deformation, its low surface hardness cannot produce high radiation acoustic velocity. But with the sound of the bass sound is full and deep, very suitable for. Now the paper membrane used in the bass and midrange horn, paper diaphragm tweeter has almost disappeared.

About in the early 1980s, the plastic diaphragm began to appear, in the alto and bass horn at first on the BBC by Bextrene and later PP (polypropylene) is more and more common, has become more and more popular. Today's speaker using this material accounted for a large part of the. Polypropylene diaphragm with high damping characteristics, not affected by humidity, casting out any desired thickness and Pu shaped, soft light and hard, physical properties and characteristics of sound are very good, polypropylene can also and other materials mixed plastic cast hardness higher vibration membrane, such as mixing ceramic powder, fiber glass or graphite, a lot of changes, to in fact polypropylene diaphragm voice is better than paper diaphragm, a matter of opinion, using this material manufacturers ballyhoo seems to only advantages without disadvantages, but some people still think paper diaphragm sound better, polypropylene with "plastic" flavor. Anyway, the polypropylene materials have been factory by the manufacturers and a welcome, it is not limited to use in the midrange and woofer, tweeter diaphragm is also suitable.

Metal diaphragm has appeared in the 1980s, but it was only in the initial stage, revealing many shortcomings, such as sound dry, hard, treble ear piercing, although transient response fast but the tone is not natural, after years of improvement, the treble unit hemisphere metal diaphragm, above all, the success of and materials including light metal aluminum, aluminum alloy and titanium, the strengths and avoid the drawbacks of the, in recent years the metal diaphragm dome tweeter became over popular, even cheap speakers also adopted.

To on alto and bass unit uses the metal diaphragm to achieve the excellent performance or in recent years., British AE (acoustic energy first made full metal diaphragm loudspeaker, receive the highest rating, but the price is expensive. Following the Monitor, Audio AE also developed the metal diaphragm speakers, will this technology to a more mature stage. The advantages of all metal diaphragm loudspeaker is the speed of sound, clean, high transparency and special industry wide yang.

Around the vibrating film has a ring of edges and moving frame, it is a flexible material for free movement of the suspension, the use of a variety of materials, including natural rubber, synthetic rubber, PVC plastic, early more manufacturers use the film, they are made of wavy or positive and negative half of the surface with a very high degree of flexibility to the edge of a large range of activities, the general ventilation type speaker is a low degree of flexibility, which is considered the main cause of the material.

Support

The work of the horn is to maintain the mechanical structure and stability and provide accurate activity, the support must be constructed and avoid resonance, the general horn using the supporting material has steel, aluminum alloy or magnesium alloy, steel bracket is made of high pressure, if the steel is thick, and now many large diameter of the bass trumpet still use steel bracket, but if the steel is too thin it is easy to cause resonance, steel bracket manufacturing cost is low, so in low speakers generally use.

Aluminum and magnesium alloy die casting stent in robustness and anti vibration performance is better, the appearance is also more beautiful precious, but this kind of scaffold manufacturing cost was higher than that of the steel frame. Some speakers especially Japanese goods, although the price is not expensive, but also the use of alloy die casting, mainly in order to make the appearance more attractive, in fact, the quality of the horn.

Voice coil

Coarser, and two and speaker voice coil according to the low, middle and treble unit, loudspeaker voice coil with a very fine wire wound, including copper and aluminum wire, aluminum wire weight is lighter, can obtain better transient response, but the bearing capacity and durability than the copper wire, the tenor and the low tone horn with copper wire around the voice coil of copper wire can bear high power, some bass horn around two to four voice coil to increase the bearing force, and the copper line shape is also different, for example, round, hexagonal and rectangular cross section, circle line the most common use, hexagonal and rectangular wire can be tightly packed without leaving voids, can increase the heat dissipation efficiency corresponding to improve the power capacity.

Ordinary loudspeaker voice coil around on a piece of paper tube, but paper is not a good conductor of heat, only with the advantages of light, in order to improve the efficiency of heat radiation, some speakers by aluminum or Kapton voice coil tube, the voice coil is fixed on the tube due to better heat dissipation, a significant increase in capacity, recently more and more Doyon acoustic device adopts the materials.

Most commonly occurs on the horn of the horn, because it is the voice coil with a thin wire, can not withstand the high power, some speakers with protection circuit, when the input current is too high to automatically cut off or reduce the current to prevent high pitched horn damage. The tenor and bass speaker voice coil is strong is not easy to burn, may cause the voice coil hit bottom or skew when input is too strong.

Magnet

Early in the use of magnesium nickel cobalt (Alinco) alloy, it has the advantages of high strength and easy to prevent leakage of magnetic field, but manufacturing costs are increasingly high, manufacturers are forced to use iron oxide magnets, also known as ceramic magnets, which also has a very high magnetic force, but the need to use large, some of the magnetic force of the magnetic field is 30 to 20 pounds, magnetic field spread, use must be carefully controlled.

A rare earth magnet said samarium cobalt, Chinese name translation SmCo magnets, magnetic for five to six times of the traditional magnet, therefore only need to use only a small amount can reach sufficient strength, clam this magnet is expensive, is more suitable for high unit, alto and bass unit is very rare. V Audio Converter

The audio device is composed of three parts, including inductance coil, capacitance and resistance, the coil is made of copper wire, high pass part of the line is thin, the lower part of the line is thick, the core of the audio device with air core and iron core type, depending on the design and the. Capacitor has a great impact on the quality of the sound quality, and now the high quality speakers in the use of multi - tone capacitor, it is the quality of the very FI HI fans attention.

General speaker of the voice of the device will be installed on the circuit board, neat and beautiful, but the circuit board copper track narrow relationship, may be bad for the big current mark, so some of the fever level speakers use directly with hard wire welding, get better quality.

Sound box

The speaker sound box material is mainly required to have good damping characteristics, strong resonance, design in order to achieve this goal has been selected a variety of materials, including particleboard, plywood, fibreboard, plastics, even used artificial marble, concrete and metal. General sound box multi-purpose wood splint or shredded wood grain pressure plate, take the easy cutting and manufacturing, density fiberboard (MDF) is now a lot more advanced loudspeaker using, with more of the wedding day. Celestion first used in their SL600 Bookshelf Speakers of aviation technology, with three sandwich structure of the aluminum made of sound boxes, such as the construction of the aircraft floor, very strong no resonance, the bookshelf speakers are very successful. The sound box structure is another innovative B&W Matrix, internal skeleton type structure with sound-absorbing latex to obtain pure tone.