College】 【weak voice of the speaker materials --- Power By 【China】 weak home network..

<br> <BR> speaker is basically a drive unit, crossover sound box structure, the three-part design is important, the materials used on the sound quality is also closely related to the change in part of materials if the rest remain unchanged, the sound .there must be a difference, this difference may be very obvious, some love-it-yourself enthusiasts try out different materials instead of the original materials, such as a crossover replaced by "tonic level" with a fever line capacitance or replace the original wiring, and some .make quality improvements, and some damage to the original sound balance. .Parts affect the sound quality is an elusive thing, replacing the tonic part you think will improve the sound, sometimes the contrary, some parts match the original but better sound quality or balance, this may be a carefully designed experiment has been reached .the best combination of parts. .Enthusiasts can make their own tests, but one would lose by such a warranty service agent, you are free to change the original parts, a problem at your own course. .<BR> <BR> <BR> <BR> Drive unit drive unit known speakers, materials used in construction there are several points worthy of special attention, electric horn diaphragm (in and said woofer diaphragm or cone) .There are several materials, paper cone has a long history, whichever is lightweight and has the appropriate damping characteristics, there are still a number of plants to birds to stick with, but the paper vulnerable to damp rotten or deformation of the diaphragm, and its surface hardness is low, .can not produce high radiation acoustic speed. .But for the full deep bass sound speakers, very fit. .Now more than paper cone speakers in the bass and midrange to use, paper diaphragm tweeter has almost disappeared. .<BR> <BR> About the early eighties, plastic diaphragm began to appear, in the midrange and woofer on the BBC initially used Bextrene, then PP (Polypropylene) become increasingly common, more and more popular, today's speakers using the .species accounted for a large part of the material. .Polypropylene has a very high negative Bennett diaphragm of, free from moisture and may, plastic cast out any desired thickness and Po-shaped, light and hard, physical characteristics and sound characteristics are very good, polypropylene and other materials can also be .higher hardness of mixed plastic cast diaphragm, such as mixed ceramic powder, glass fiber or graphite, etc., change a lot, as it actually sounds better than paper, polypropylene diaphragm, the diaphragm, a matter of opinion, the use of this material manufacturers boasting .it seems that only advantages and no disadvantages, but some people still think that sounds better on paper diaphragm, polypropylene with "plastic" taste. .In any case, this material has polypropylene plant welcomed by manufacturers and users, it is not limited to use on midrange and woofer, tweeter diaphragm is also suitable. .<BR> <BR> Metal diaphragm has emerged in the eighties, but it was only in the initial stage of technology to reveal the many shortcomings, such as dry and hard sound, treble Laer, although the transient response is faster but does not sound natural, after years of .improvement of the metal diaphragm dome tweeters first success, materials including aluminum, aluminum alloy and titanium and other light metal, the strengths and avoid the bad play, the metal diaphragm dome tweeter in recent years become popular all over, even cheap speakers also use .. .<BR> <BR> As for the midrange and woofer to achieve good performance of the metal diaphragm or a few years ago, the United Kingdom AE (Acoustic Energy) made the first all-metal cone speakers, receive the highest assessment, but the sale price. .After following the AE, MONITOR Audio is also developing sake of the metal diaphragm speakers, will this technology towards a more mature stage. .All the advantages of metal diaphragm speakers sound fast, neat, treble Young workers in particular broad and transparent. .<BR> <BR> Circle around the edge of the diaphragm and the fixed frame connection, it is a compliant material to provide free activities for the diaphragm suspension, a variety of materials used, including natural rubber, synthetic rubber, PVC plastic, .Early Canadian film with more some manufacturers of cloth, they are made of positive and negative half-wave-shaped or curling a specified degree of food that the level of supple, air cushion edge subwoofer speaker will face a very high degree of order to substantially compliant .activities, the general ventilation speakers need is supple degrees lower edge, which is considered the main cause of that material. .<BR> <BR> <BR> <BR> Horn bracket frame work is to maintain stability and mechanical construction activities for the diaphragm to provide accurate, supports must be strong and avoid resonant structure, the general speaker scaffold used with steel, aluminum .or magnesium alloys, high-pressure steel frame is made of thick material, then if the steel is also very strong, now many are still large-diameter steel frame woofer, but if the steel material is too thin can easily lead to resonance, the steel frame manufacturing costs .low, so commonly used in cheap speakers. .<BR> <BR> Aluminum or magnesium alloy die-casting of the stent in terms of robustness and better performance anti-resonant, beautiful and valuable than appearance, but the manufacturing cost of these stents compared with a steel frame high. .Some speakers, especially Japanese goods, while price is not expensive, but also using alloy die-casting frame, mainly to make the appearance more attractive, in fact, the quality of flat speakers. .<BR> <BR> <BR> <BR> Voice coil speaker voice coil according to low, medium and treble units have different needs, with the tweeter voice coil of wire wound into a very fine, including both copper and aluminum wire ., light weight aluminum quality, provide better transient response, but in terms of capacity and durability is less than copper, more midrange and woofer voice coil with copper wire and thick copper wire can withstand high power .Some two to four around the woofer voice coil increases capacity, as copper have different shapes, such as round, hexagonal and rectangular cross-section, the most commonly used round wire, hexagonal and rectangular lines can be closely packed without leaving any gaps, can .corresponding increase in cooling efficiency increases power capacity. .<BR> <BR> More common around the speaker's voice coil paper tube, but paper is not a good conductor of heat, only to have the advantages of light, in order to improve the cooling efficiency, and some speakers or Kapton voice coil with aluminum tubes, the voice coil .fixed to the tube for better heat dissipation, a significant increase in carrying capacity, more and more recent speakers using this material. .<BR> <BR> Speakers mostly in the general firing loudspeakers, and because of its voice coil wound with a thin, can not afford high-power, and some speakers with protection circuit, when input current is automatically cut off or reduce the high current .prevent damage to loudspeakers. .Midrange and woofer voice coil more robust hard blows, only when the input may result in excessive or deflection coil end collision. .<BR> <BR> Speaker magnet <BR> <BR> early use more magnesium nickel and cobalt (Alinco) alloy magnets, which has high strength and easy advantage of preventing leakage of magnetic hysteresis Unfortunately, the rising manufacturing costs, manufacturers are .forced to use iron oxide magnets, also known as ceramic magnets, it also has a very high magnetic force, it requires large, and some subwoofer magnet weighing 20-30 pounds, the spread of strong magnetic field, for use in flood control and to be careful magnetic .control. .<BR> <BR> Have a rare earth magnet known as Samarium Cobalt, SmCo magnets Chinese name translation, and its magnetic magnet for the traditional five to six times, so only a small amount can be achieved with sufficient strength, clams that .types of magnets are very expensive, more suitable for high-unit, tenor and bass unit even rare. .<BR> <BR> <BR> <BR> Crossover crossover usually form in three parts, including the inductive coils, capacitors and resistors, coils are wound with copper wire, high-pass part of the line of smaller, low-pass .part of the line thicker, the coil crossover with air core type and core type, depending on the different design may be. .Capacitors were great impact on the sound quality, and now high-quality multi-speaker carved polypropylene capacitor tuner, the quality of its highly HI FI fans attention. .<BR> <BR> General multi-speaker sweep damper installed in the circuit board will be part, neat appearance, but the copper circuit board traces due to the narrow channel between, may mark the high current negative, so some of the enthusiast with the direct use of the speaker .hard-line welding, to achieve better sound quality. .<BR> <BR> <BR> <BR> Speaker sound box sound box materials are mainly requires a good damping characteristics, and strong non-resonant, designers in order to achieve this goal, in the past has selected a wide variety of materials, .including pieces of wood, plywood, fiberboard, plastic, or even use artificial marble, concrete and metal. .Sound boxes and more generally of wood grain laminated plywood or boards of wood fragments, whichever is easier to cut and manufacturing, now many more advanced speakers, medium density fibreboard (MDF), has more features wedding day. .Celestion SL600 bookshelf speakers in their use of aviation technology on the first, with three aluminum sandwich structure of the sound box, like the floor of the plane's structure, as no resonance is very strong, it shall bookshelf speaker was very successful. .Another innovation is the sound of B & W box structure of the MATRIX, as a skeleton structure with the internal sound-absorbing latex to obtain pure sound quality. .<BR>.