this should have nothing to do with clipping or stripping anything.
there should be an rca input on the amp. and rca are far better than that box-4 or hi-level input or whatever it's called. i don't see how tapping off the back speakers would accomplish a signal for the amp, because the actual speaker signal and rca carrying signal are two different things, if i'm not mistaken..
either way, go from rca to rca. best you can do.
like i said though, go to the local board and see if someone good with audio wants to lend a hand.
