Axiom Home Page Forums General Discussion Technical Questions EP600

The standard solutions are a filter for the sub cable and/or a filter for the AC receptacle. I've tried the filter for the AC receptacle and it didn't do anything. I haven't tried the filter for the sub cable because I don't know how exactly it works. If it's a 60Hz notch filter, no thanks as 60Hz and the band around it is contained in music after all.

Of course the other solution is running the sub cable in high magnetic permeability conduit but I'm not going there .

It seems to me that the most common cause of 60Hz hum is a ground loop caused by a cable or satellite connection. Have any of you tried unhooking the cable or satellite from your system to see if the hum disappears?

Should that prove to be the problem, often it can be solved by a Video Isolation Transformer such as those offered by Axiom or Parts Express. If you believe what they say on the web site, it does not affect video or audio performance.

I don't have cable or satellite connected up to any of my components. Not even the TV.

LOL! Well then a Video Isolation Transformer won't do you any good, will it?

Hi Shag - It is likely that the hum is video related. To verify, disconnect the cable feed into the cable box or satellite receiver. If the hum still persists call me toll free at 1.866.244.8796.

I had a ground loop hum not too long ago, found the source to be that our lawn guy had bumped the ground wire at the connection to the home ground rod ... a quick and determined reconnection of the wire to the ground rod rectified the ground loop.

I'd check all cable and outside home grounding sources.

Also, whenever I had grounding issues involving the cable coax the hum came through the 80s and not the 600....whether or not it makes any difference where the hum comes from, I don't know.

Lawn Guy?

Robb,

Thanks so much for this link. I will definitely look into this.