The main causes of car audio distortion are as follows:
1. Matching between audio source and host
When an external CD player or MO player is connected, the sound source signal should not be too large, otherwise it will cause saturation distortion of the power amplifier. Verification method: reduce or attenuate the level value of the sound source. If the distortion is weakened, there will be matching problems. Usually, the solution to this problem is to directly import the signal from the front-end circuit, and directly transfer the signal from the power amplifier input of the host without going through the power amplifier of the audio source.
2. Matching of power amplifier and loudspeaker
If the power of the host does not match the power of the rear speaker, it will be distorted, and the problems caused by this distortion can be verified by adjusting the volume. If the distortion is weakened, it belongs to the host problem, and the power problem of the speaker can also be checked. In addition, the line diameter is too small, and the amplification linearity of the sound source equipment is poor, which will cause audio distortion.
In order to improve the stereo sound quality, the following improvements should be made:
1. Requirements for host power amplifier
The power of the main engine should be large to ensure no distortion. If the speaker is directly driven by the host, the output power should be high, mainly to reduce distortion. At present, the output power of the main engine is generally 50W*4. If the front output of the host is used, a high output level should be selected to improve the signal-to-noise ratio, and the output level is generally 2V.
2. Improve the signal format.
In addition to the proximity requirements of the host power amplifier, in order to obtain better sound quality, we can also improve the signal format and the information bit of the sound signal.
3. Improve the sealing performance of the vehicle.
In order to reduce distortion, no matter what environment the sound is installed in, it needs absolute sealing. Then, talk about sound quality, speaker brand, technology and price. The more expensive the car, the better. You need to choose big brands, such as Pioneer, hivi and Bose. And the internal structure and materials of the car. The internal tightness and material of cars under 50,000 yuan are basically plastic, and the joints are loose and loose. Even the best stereo is not good enough to put in the car.