The equalizer is damaged or muted; Maybe it's the corner line, the host's self-protection. The power amplifier may burn out, the speaker may be accidentally damaged, and the speaker cable at the door hinge may have been broken.

Solution:

1. Use the car stereo correctly according to the instructions.

2. Go to the 4S shop to check the car audio circuit, check whether the attack and defense speakers are burnt out, and replace the damaged audio accessories in time.

Extended data

The equalizer was invented in the 1930s to correct the lack of sound. Its main use is in Hollywood film studios. Thanks to the support of an equalizer called fidelity filter, it has achieved good results in long-distance sound reinforcement, which is helpful to popularize its application and also leads to subsequent abuse.

Because several generations of sound engineers know little or nothing about the influence of equalizer on sound, it is not surprising that the sound produced by equalizer is not satisfactory in this case.

Equalizers are used to mix the input channels and the wiring equipment of the mixer, for example, on the output line leading to the speaker. Although the use of equalizer in microphone input channel reminds us of its method of shaping the sound of speakers or musical instruments, the question that is often overlooked is whether an equalizer is needed, which may be a sign of errors in other links.