Playing music with squeaky or electric noise

1. Check if the audio cable connection between the amplifier and the player is properly plugged in or has poor contact, or replace the audio cable.

2. Check if the amplifier has a radio function, if the radio volume is turned off, or if the volume knob is turned to the minimum.

3. Check if the speaker cable is connected to the constant voltage output (70V, 100V) interface of the power amplifier, and remember that the constant voltage speaker cannot be connected to the constant resistance output (4-16 Ω) interface of the power amplifier.