Car audio investment refers to the sound system that modifies or even transforms the entire car. The primary modification is to replace the host of the original car with CD, VCD, DVD, MP3, etc. The most popular audio device on the market is FM + CD + MP3 + U disk + memory card, its unparalleled compatibility must It will be all the rage.
There is not much technology to change the host, just look at the product quality and the owner's personal preferences, as well as the correct wiring and processing of the insulation of the wire ends. Due to cost reasons, the original horns generally have low power and face strong sound pressure. When large dynamic music is used, it is often distorted and affects music appreciation. Choosing a high-quality speaker for your car that suits your music appreciation habits and tastes is a key step in car audio conversion.
Car speakers will have different styles: Locke Power R5 set speaker crossover unit, dynamic, high sound pressure, active and active, pay attention to the momentum, high frequency is bright, especially suitable for rock music, symphony, pop music, etc. .
Locke power R1, R2, R3, R4, etc. pay attention to accurate sound reproduction and extremely low sound, medium frequency is delicate, balanced and full of music, suitable for expressing tender vocals, strings, etc., savoring, really "The silk is not as good as bamboo, bamboo is not as good as meat".
Car speakers are divided into: frequency division unit (set speaker), coaxial unit (full-range speaker) and woofer. The coaxial unit is characterized by low cost and easy to drive. Whether it is sound phase positioning or sound, it is not satisfactory, but the price is cheaper and accepted by most people. The frequency division unit separately designs and manufactures each sound domain unit, and then connects each unit with a frequency divider to make the whole sound range achieve extremely low sound dyeing and accurate playback, thereby obtaining better. Sound field and layering. Of course, to get better low frequencies, large diameter units are still the first choice, you can also choose a pair of good subwoofers.
The next step is to carefully select the amplifier and the wire. The first choice for the amplifier is to consider its tone. It is best to choose a neutral amplifier, and secondly to ensure that there is enough power. Of course, the stability and heat dissipation of the power amplifier work must also be considered. It is recommended to use the Rock Power M series, R series, or D series power amplifiers.
Many people think that the modification of car audio is to separate the original car equipment and replace it with a professional product with better performance. In fact, most people do the same. We can't say that there is something wrong with this modification method. It can only be said that this is only suitable for those who do not have high requirements on sound quality. In order to obtain more beautiful sound enjoyment, it is necessary to install equipment such as amplifiers and subwoofers, and it also involves the matching problem between various products. This article will provide a more in-depth introduction to these issues. Power amplifier power amplifier, referred to as "power amplifier."
In many cases, the rated output power of the main unit is not sufficient for the task of driving the entire audio system. In this case, a power amplifier is added between the host and the playback device to supplement the required power gap, and the power amplifier plays a role in the entire audio system. The pivotal role of "organization, coordination", to some extent, dominates whether the entire system can provide good sound quality output.
There are many types of power amplifiers for vehicles on the market, and the classification methods are also complicated. The most common are divided into: type A, type B and type AB according to the way of working.
Class A: It means that the amplifier collects the audio signal transmitted by the host at regular intervals and amplifies it and transmits it to the speaker. The “buffering effect†in this process ensures that the system can output a gentle and smooth sound signal. The downside is that the energy consumed is large.
Class B: The power amplifier cancels the “buffering effect†mentioned above. The operation of the amplifier is always in a timely state, but the sound quality is worse than the former.
Class AB: Power amplifiers are actually a combination of Class A and Class B. The on-time of each device is between 50% and 100%, which can be regarded as the current ideal power amplifier.
When purchasing a power amplifier, first pay attention to some of its technical indicators:
1 input impedance: usually indicates the anti-interference ability of the power amplifier, generally in the range of 5000 ~ 15000 Ω, the larger the value, the stronger the anti-interference ability;
2 Distortion degree: refers to the degree of distortion of the output signal compared with the input signal. The smaller the value, the better the quality, generally less than 0.05%;
3 signal to noise ratio: refers to the music signal and noise in the output signal.
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