I was moving some wires around earlier, and when I put the RCA's back into my sub amp, the subs constantly thump. The only time they don't is when I pull up on the part where it connects to the amp. Is there a way to fix this, or do you think I should send the amp back to the factory for repairs? I guess something is lose, but I don't know. I don't want to open the amp up cause I don't know what I would be looking for in there anyway. Any suggestions? The amp is a MTX 2300x.