Basic Composition of Car Audio Modification System
Dec 22, 2022 View: 310
- Audio source (host)
Most car stereos use CD, DVD, MD, MP3, etc. as the audio source part, which is what we usually call the host. As the origin of the sound, its installation location is generally installed on the console of the car, which is not only the core of all audio systems, but also an important part of the audio system. Among them, the sound quality of the CD player is relatively pure, while the capacity of the MP3 and MD players is relatively large, and the functions of the DVD player are relatively rich. In short, different hosts have their own strengths.
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2. Amplifier
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The power amplifier is also the power amplifier, which is responsible for amplifying the power of the pre-stage audio signal and then using it to drive the speaker. Generally, most of the built-in power amplifiers of the main unit have very small output power, and their sound quality effects cannot be compared with external power amplifiers. If you want better sound quality or drive more powerful speakers, additional power amplifiers are indispensable. Power amplifiers can be divided into Class A power amplifiers, Class AB power amplifiers, and Class B power amplifiers according to their structure.
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3. DSP power amplifier
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DSP power amplifier is also called DSP digital power amplifier. It adopts DSP chip, which can adjust the parameters of each channel through computer. The biggest difference from traditional power amplifier is that DSP power amplifier can manage the power amplifier better through computer, while traditional power amplifier can be better managed by computer. Point is impossible. The DSP power amplifier has the functions of other power amplifiers, and at the same time, it can also attenuate the overlapping frequencies caused by the car environment, and the attenuated frequencies can be added, and it can also adjust the distance between the speakers in the car and the human ear.
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The DSP power amplifier mainly has delay processing, EQ adjustment function, and frequency division function, which can adjust the defects that cannot be adjusted physically in the car, completely improve the complex audio environment in the car, and make the sound quality clear.
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4. Speaker
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As a restoration device in car audio, it restores the sound channel and is the most important component that affects and determines the performance and sound quality of the car's audio. Car speakers can be divided into tweeters, midrange speakers, and woofers according to frequency response; according to type, they can be divided into set speakers and coaxial speakers. Coaxial speakers are full-range speakers that can respond to full frequencies. On the other hand, the speaker set is an independent split design, and is equipped with a crossover, so that a better full-frequency response and sound field distribution design can be obtained.
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5. Subwoofer
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The subwoofer is the heavy bass part, which is used to compensate low frequency and reproduce ultra-low frequency. It is divided into active subwoofer and passive subwoofer. For a complete sound system, the subwoofer is also indispensable. Its function is to make the low frequency output of the whole sound system better and the music more full. But there is one thing, the power consumption of the subwoofer is relatively severe, which may reduce the life of the battery.
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6. Wire
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When it comes to wires, many tuners only regard them as ordinary accessories, but in fact they are not. A good audio system is inseparable from wires. No matter how good a set of audio equipment is, if there are no good wires to assist, the sound quality will not be good. Will be greatly discounted. Cables are mainly divided into three parts: power cables, speaker cables, and signal cables. When choosing cables, you must not only have good quality, but also match the speakers, power amplifiers and other equipment. The cables also determine the final sound quality.
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The Technology of Automotive Sound
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1. Installation technology
Part of the car audio is installed on the main console of the car, and because the internal space of the main console is very small, this has extremely high requirements for the installation technology of the car audio. At present, the commonly used mounting hole size in the world is based on the German industrial standard size known as DIN, and its length, width, and height are 178mm, 50mm, and 153mm, respectively.
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2. Shock-absorbing technology
When the car is driving on a bumpy road, its vibration frequency will be greatly increased, and it is easy to resonate with the car audio speakers, which greatly reduces the driving experience of the driver and passengers. This shows how important the shock absorber technology of the car audio system is.
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3. Sound quality processing technology
With the development of research technology, advanced car audio achievements such as DSP power amplifier, DAT digital audio, 3D surround sound system have gradually appeared in people's field of vision. The editor here emphasizes that many car owners often ignore the importance of tuning when purchasing a car speaker set.?
4. Anti-interference technology
Since all the electrical appliances in the car use the same battery, the car audio system will naturally be subject to various electromagnetic interferences. The anti-interference technology is to use the choke coil string to filter between the power supply and the audio system, and then use the metal shell to shield the radiation in the space, so as to reduce the interference caused by the external electromagnetic to the car audio system.
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5. Active noise reduction technology
The active noise reduction technology neutralizes the noise through the reverse sound wave generated by the internal system that is completely equal to the external noise, thereby achieving the effect of noise reduction.
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