1、 Check whether the noise is caused by the failure of the audio cable connection
Check whether all wiring is loose or faulty. First, check this step to ensure that the cause of the fault can be correctly determined in the future.
2、 Check whether the noise is caused by the problem of the conference speaker
1. How to judge which horn unit is broken
It is easy to find out whether the speaker unit is broken. Just adjust the front panel of the amplifier to find out which speaker unit is faulty. First, turn the left and right balance to one side to find out which speaker has a problem, then turn off the treble to see if there is a problem with the bass. If there is no problem, turn on the bass, turn off the treble, and listen to whether there is a problem with the treble. Try the same method for the other speaker.
2. Determine whether there is a problem with the frequency divider of the conference speaker
To determine whether there is a problem with the frequency divider, we first determine the speaker unit. If there is no problem with the speaker unit, or if there is a problem with the speaker unit, but the unit has been replaced and there is still noise, then we can replace it with a good frequency divider and try it.
3、 Check whether the noise is caused by the aging of conference power amplifier
The simple way to check whether the amplifier is aging is to rotate the big knob of the music and microphone to see if it will enhance the appearance of noise, or if there is sound at one time and no sound at the other. If the problem is judged to be the power amplifier, the power amplifier can only be replaced or returned to the factory for maintenance.
4、 Check if there is a problem with the audio source itself
It is also very common for music or microphone itself to cause noise. For example, music itself can be judged by playing it on a mobile phone. If it is, it is necessary to download lossless music again; If the microphone can be tested with other microphones, it can be determined.