hey..i recently bought a used Peavey TNT115/BW and im having problems with it. basicly when it gets too loud, the sound will cancel out and if its really loud itll start to skip like a scratched cd until i turn it off..but anyways i emailed the guy and he said having a 'bi amp' system really helped cause he had had the same problems. he said something about getting a smaller like practice amp and hooking them together or something to help with the lows and such..?? i never really thought about it til i saw bush preform live and th bassist had a little peavey practice amp next to his big amp..whats a bi amp system and hows it work? also,anyone that may have a diagnosis for my amp trobules?