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Ok, much ado about nothing! I changed the cable and the hum went away. But as always, I learned a great deal from you all and will know how to problem solve in the future. Thanks again! P.s. No SHS, it was not welded to the wall! :) Just hard to get to once I backed up the stand and...

I'm pretty sure the outlets are not the problem. We had the basement professionally finished with a licensed electrician doing the electrical work. Then the city inspector came and did the inspection and everything checked out ok. The only wiring I have in the walls is the rear speaker wire...

All good advice. I will try changing the rca cable first and go from there. The outlets are brand new. Just fininshed the basement so I don't think that's the problem. Just a pain the the behind to get to the recevier. We just moved it all back into place last Saturday! :frowning:

I read one of the links that Scott posted on ground loop hum. It's a bit technical and I'm not expert! But I think I understand it somewhat. A few minutes ago I tried plugging the sub into a different outlet. No effect. Tomorrow I might try a different rca jack. See if that helps.

So I checked my sub after about an hour after I turned it to auto. The red light went on (I assume that means off) instead of the green when it's on after I checked on it about an hour later. However the hum remained even when the red light was on. Weird. I again disconnected the cord to...

Thanks for all the replies. I already have the sub connected to a power bar/surge protector made for Home Theater by Belkin. Is that what you guys mean by power conditioner? I unplugged the jack going from the receiver to the sub (which is a 'Y' cable-connected to one plug which splits...

Hello all, I have a Velodyne subwoofer attached to my receiver. I have noticed lately that it is making a humming sound (or just a low bass sound) even when the receiver is off. I did not notice it before. I have turned it off for now as I found it a bit annoying. It's the kind of...