Car audio knowledge：

Primary modification was the host of the original car for CD, VCD, DVD, MP3 and other; is now on the market the most popular CARD FM +CD+MP3+U disc + store audio equipment, its incomparable compatibility will be all the rage. To change the host without much skill to speak, only to see commodity quality and owners of self love, and accurate wiring and processing thread of the insulation.
The car horn is divided into: dividing unit (speakers), coaxial unit (Tritone horn) and a horn. Coaxial unit is characterized by low cost, driving in a brief, both sound localization, timbre is still are not too satisfactory, but the price is cheap, for the majority of the people accepted. And frequency unit is the range monomer separate planning and production, to frequency divider will each monomer cohesion, the gamut do sound very low dye and the accurate reproduction. So we can get a very good sound field and a sense of hierarchy. Of course, to get a very good low frequency, large diameter unit is still the first choice, you can also choose a pair of good.
The next step is to carefully select the power amplifier and wire, the selection of the main power amplifier to think about its sound, the best choice of neutral power amplifier, and then to ensure that there is enough power. Of course, the stability of the power amplifier and heat dissipation is also necessary to think, advocated the use of "DLS", "BKELL", and other well-known brands. This kind of commodity price is high, have safeguard. Many people think that the modification of car audio is the equipment of the original car alone remove, change function more ideal professional commodity, in fact most people is to do so, we cannot say this modification way what is wrong, can only say that it is only fitting that those you on sound quality request is not high, in order to obtain a more beautiful sound to enjoy to touch to the installation of the power amplifier, in a low voice, artillery and other equipment, and also touch between sections of the commercial deployment of doubt. This article will make a deep comparison of these questions.
Power amplifier, power amplifier, power amplifier, power amplifier, power amplifier". Automotive audio console on the adjacency said before, many host additional output power can hold the shares of all the audio system, then we must in host and broadcast equipment installed between the power amplifier to compensate for the power gap, and power broadening is in all the audio system sideways to the "arrangement and harmony" of the link, in a certain extent manipulation of all system can deliver outstanding sound output.
Currently on the market with a lot of varieties of power amplifier, classification is also complex. The most common method is divided into: A type, B type and AB type. A class is to expand every must be constantly collect a host transmission over the audio signal, and its expansion is then transmitted to the speaker, and this process sideways "buffer" ensures that the system can output, gentle, smooth sound signals and shortcomings is consuming more energy. Class B power amplifier is to cancel the said in front of the "buffer", expand the operation always in timely, but sound quality than the former to some poor. AB class amplifier, in fact, is a Class A and B type of contact, the conduction time of each device in between 100% to 50%, can be called the current power amplifier contrast.
Purchasing power of the expansion time, first to pay attention to some of its skill objectives: input impedance: usually indicates the size of the power to expand the anti - interference ability of the, usually in 5000 to 15000 Omega, the number is more representative anti-interference ability is stronger; distortion II: refers to the output signal is compared with the input signal distortion,, the smaller the value, the better the quality, usually below 0.05%; (3) signal to noise ratio: is refers to the ratio between the output signal music sideways signals and noise signals, higher values represent the sound more clean. Other, in the purchasing power of the expansion of cent clearer since the purchase voluntary, if you want to install gun in a low voice, best buy 5 channel amplifier, usually 2-channel and 4-channel speaker can only promote speakers before and after, and in a low voice cannons only another with amplifier, 5 channel amplifier can deal with this question. The output power of the power amplifier is also greater than the additional power of the speaker.
Whispered cannons and front introduced the sound equipment comparison, using probability of guns in a low voice seems to be the lowest, often now young people full of love the taste of metal music side is a lover of pop music and rock music owners essential choice. In principle, the operating method of the low voice gun and the speaker is completely same, only the size of the shock film is larger, usually in the 8 to 10 inches, and the increase of the speaker for the resonance.
Target assessment, whispered gun with a loudspeaker are fundamentally the same, details here is not to do is introduced in detail, only talk about the numerical aspects of the request, the frequency response usually below 200Hz, additional impedance for 4 ohm mercy, sensitivity is usually greater than 90dB/W/m.
At present, the low voice gun can be divided into two types, the active low voice gun and the passive voice gun. Active low voice gun is refers to itself has the power amplifier's low voice gun, when the application does not need to add the power amplifier, usually the shape is the tube type. The deficiency of this kind of low voice gun is that the heat dissipation is not ideal, the power is not very big, and the tube shape is usually not necessary. By contrast, passive voice gun operation when the demand for external power amplifier. The appearance and power of the low voice gun selection can be more sensitive, the role of natural also become more ambitious. Other active speakers can be divided into sealed boxes and boxes, the former is more suitable for deep Symphony