The hum is as soon at the TV is turned on. I am using it as a glorified monitor. There is nothing else plugged into it. The TV came from my grandmother and it being used in the other room in the basement. Heck, I probably could steal the old 40" Samsung in the gym that my wife uses to watch TV while jogging.

Anthem: AVM60, Fosi DAC-Q5
Axiom: ADA1500, LFR1100 Actiive, QS8, EP500, M3, M3comp, M5