Greetings all. This might sound confusing but I will post my findings.

 

Basically I installed a x910bt yesterday. It was replacing another aftermarket stereo that worked fine. When I got it in, the functions of the stereo all worked. The volume is fine at a low level. When I increase volume its crackly and just wont go loud. Basically low power. If I fade the speakers to the front I can turn it up with no problems. If I balance to right front and rear I can turn up with no problems. I reinforced my ground and the left rear speaker wires thinking it was either a weak ground or a bad connection with the left rear speaker. No dice. I disconnected the rear speakers but even with them disconnected if I have the balance / fade centered I get the same problem.

 

Any ideas where to go from here?