now switch the speaker outputs on the amp. This will tell us if the amp is doing it.

 

I have and the problem switches to the other side. I'm trying to get ahold of another amp to test it out. It's just that I bought the amp new so I think it's really odd if something like this would be an amp issue but I think I've exhausted all other possibilities.

 

if it did not switch sides with the RCA's, but did with the speaker wire then you need to check your speaker wiring. You either have something bad behind the amp(speaker wiring) or the amp is bad...........