sub ground loop hum..........

[unknownuser]

What is the proper way to isolate and eliminate a ground loop hum on my subs??? They won't turn off on "auto"


(Originally posted by: Mark Saito)

[billfitzmaurice]

> What is the proper way to isolate and
> eliminate a ground loop hum on my subs???

<A HREF="http://www.rane.com/note110.html">http://www.rane.com/note110.html</A>

[dw4]

There are many common sources for ground loop problems these days. Balanced audio lines would solve all of this, but that improvement is not likely to happen to consumer audio gear any time soon.

To your issue,
Is this sub on a home theater system? If so, are you connected to Cable or Satellite? If so, the cable TV feed is likely a source of your problem (note I said "a" and not "the"). Disconnect the cable from your wall and see if that ends the hum. If so, an isolator such as one of these on the cable line will fix the problem.

<A HREF="http://www.partsexpress.com/webpage.cfm?&WebPage_ID=3">http://www.partsexpress.com/webpage.cfm?&WebPage_ID=3</A>

or

<A HREF="http://www.mcminone.com/product.asp?...me=MCMProducts">http://www.mcminone.com/product.asp?...me=MCMProducts</A>

Post again if disconnecting your cable (or if this fix does not apply to your installation) does not work.

[martyh]

> What is the proper way to isolate and
> eliminate a ground loop hum on my subs???
> They won't turn off on "auto"

Well, the way I did it was simply by 'isolating' the ground prong from the sub amp. Get one of those little $.99 three-into-two adaptors at the hardware store and try that. It worked for me!