Hi Tommy; I'm sorry I can't help you, but you've maybe helped me. I have a pair of McCormack DNA-2DX amps that hum at various levels. I've talked to Steve McCormack about this at length, and he says that most likely there is DC leakage into my AC lines, and that there is nothing they can do about it (is this the sine wave clipping that you mention?).
I have not yet contacted the power Company, but have a hard time believing they would have much interest in it? BTW, my amps are at SMc being upgraded, and I specifically asked them to check out their tendency to hum. Steve has told me that they do not hum in S. Calif.-- probably not enough power to muster up a hum ;>). We'll see. Craig.
I have not yet contacted the power Company, but have a hard time believing they would have much interest in it? BTW, my amps are at SMc being upgraded, and I specifically asked them to check out their tendency to hum. Steve has told me that they do not hum in S. Calif.-- probably not enough power to muster up a hum ;>). We'll see. Craig.