Hi gang,

I have a 950 Pre/Pro that I love dearly.

I use my 950 to drive a Crown K1 amp and two SVS CS-Ultra subwoofers.

Recently, I developed an unexplained low level hum in my subs. I can see the low signal present on the display of the Crown amp, as well as hear it if I am close to the subs.

After suspecting cables, and all the normal stuff I was stumped. You see my room is a professionally designed HT and as such all the power is on the same phase and leg, so I should not have power hum/ground loop type problems.

Anyhow after almost pulling my hair out, I found this thread in the 950 archives here:
Low Level Hum in 950 Sub Output

I tried disconnecting my Cable input, and voila the hum completely disappeared.

I'm now going to get the Xantech 63400 Ground Breaker, as suggested in that thread.

Xantech 63400 Ground Breaker

I'll post back, but I suspect this will fix my hum problems.

Thought someone else may run across this problem in the near future!!

Take care,

-- Cain

PS Looking back I should have suspected this. I only recently added Cable down in the theater, and I should have realized it was the only thing coming in there with the potential to create hum.