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I need some guidance on how to fix my EMG-HZ BTC System EQ controls in my Jazz Bass. I still get sound but it is so Diminished and yesterday when I was messing with the bass, I would Juggle the knobs and they are all Very tight in the holes. When I jiggled the plug-in cord the volume corrected itself and became at a normal level. Only to fade out again on its own and I could not get it to repeat this. What do you all think could be going on with my BTC controls? How do I fix this problem? Thanks, Marty Fields [email protected]