So I just received a c1100.4 on monday got it all hoked up and sounds amazing. Its not really tuned in or anything just set on full for my components. But today I was just doing some more work with wiring everything up and I plugged in the bass knob and everything still works but it doesn't do anything. The power light kicks on like normal but when you adjust the knob it doesn't change the bass level or sound level at all. Is there a setting I have to put it on or is it just a bad knob?