Could some please tell me how to fix the noise that a my treble and bass knob makes, it sounds really bad! I went to play a church today and while i was turning the bass knob it's like the whole church stop and started to stare at me. I was very embarrassed and I wouldn't want that to happen again. The treble knob is right above the bass it's like a 2 in 1 an both makes a lot a noise when turning. PLEASE HELP
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