Axiom Home Page Forums General Discussion Home Theater New EP500/EP600 owners?

There is another thread titled "EP500 Hum" in this same (Home Theater) forum that is addressing that issue. You might check that out. It's likely you have the same problem. Else, call Axiom. Those Axiom people are very helpful.

darthkringle,
I had the same humming sound comming from the sub when I first hooked it up. I read some posts concerning ground loop issues on this and other sites and most suggested disconnecting the cable tv first to see if the humming goes away. For me, that did the trick. I went out to radio shack and picked up a couple of pieces that took care of the humming. The other thing the posts suggested is to make sure all components are grounded at the same point, meaning using the same outlet, if possible. I went out and purchased a quality strip to test if this would work as well. The sub was plugged in to another outlet. It actually helped quite a bit, with the exception of an almost inaudible hum. I don't remember the part numbers used but I did post them in the other thread mentioned earlier.

Good luck and feel free to contact me for more info.