If the cheap amp is the source of the ground loop, just swapping speaker wires won't make the noise go away... the cheap amp has to be disconnected from the RCA signal cables to remove the ground loop.

Right. What I meant to imply was I would completely remove the small amp from the equation and only use the expensive amp to temporarily test to see if I heard the noises through the front speakers.

Just a miscommunication. ;)

(O|||||O)