hey guys got a problem with a new audio pipe ap15001d worked vary well at first then started humming (sub bump then humm at bass knob minimum) ... ignored it for a while then bass knob stopped working... wire came off. re soldered it and it worked for a while but humm and bump still there plus minor humm always..humm got progressivly worse last few days, got a wild hair yesterday and relocated amp. humm still vary present .. SO today... started by cleaning amp ground area, and grounding rca's... didnt help so i figured i would trouble shoot a little, pulled HU silent for a moment then i touched rca's and there it was. pulled rca off amp, still there... pulled bass knob and it stopped so i just said f it and turned everything off but its been bugging me since.. so could there be a reason bass knob went bad? or was it just faulty? is there a way to test? also off subject ive been reading around forum and came up with other questions.... what is clipping (someone said this amp will clip easy) what is a scope? i realized after the fact of buying but the top of this amp says 16volt pretty sure stock runs 14.4v but i could be wrong... anyways how would i go about running 16v constant. didnt think 1500watts was that much kinda scratching my head at all this.