So I have my HD500 running mono into a Mosvalve MV-962 power amp and into my Carvin 4x12, it sounds good but when I try to run dual amps (Treadplate and Angel F-ball) and pan them center it sounds like the signal is overloading and fuzzing out. I have my input set to guitar and same. I noticed this when running stereo into my monitors too, as soon as I start panning them to center from far wide left and right it starts fuzzing out.