I'm currently using a Pioneer Elite receiver as a processor - connected to a 5-channel power amp. I have one (main) speaker that breaks up and cuts out. I checked all the speaker cables, everything is fine, and I just replaced the interconnects, so there's no problem their. What puzzles me is that I had this speaker on channel 1 of the amp...then I switched it to Channel 2, moving the other main speaker to Channel 1. It began working properly. The strange thing is - you would think that other main speaker that I moved to Channel 1 would now have the problem - but it doesn't. They are both working fine at the moment. What worries me is that I have a new Marantz 7005 processor being delivered today, and I'm worried I might run into this problem again during setup. Do I have a problem with my amp? Any thoughts?