My money is on a ground loop... I had the EXACT same issue with my amps when i got Time Warner cable installed.... if you unplug your cable box and play music from a CD, do you still have the same Hum...


If you unplug the cable box, unplug the coaxial cable, as well as disconnect the cable box from your receiver.

The solution is a ground loop isolator, which is about 50$.. I bought 2 of them from Axiom... One for each room i have a stereo in..


On a side note, it is highly unlikely it is the amp.. Axiom is putting each amp on the test bench before they ship, to verify everything is good to go...


Edited by dakkon (09/10/12 10:41 PM)