I just got my replacement ADA1000, and I think what I'm hearing is ground loop hum (~120hz, doesn't change when I change the volume on my AVR).

I tried disconnecting my subs, and the noise did not go away. I tried removing the trigger as well, without success. What else can I do?

Axiom M5HP VP160 M3 ADA1000
Anthem MRX 720
SVS SB-3000 (dual)