What to do if the Background Music is too Loud and the Mixed Mics are too Quiet?
Turn down the level of input music and the Music Control on the receiver.
Stream the music to the speaker directly so that you can adjust the volume separately.
How to Solve If the Receiver Makes a Lot of Noise?
Try a different cable and a different input jack on the speaker.
Turn down the volume of K036 and turn up the gain on your amp.
It may be interfered with by the cell phone or even the light; please be away from that stuff.