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post #1 of 5 Old 04-27-08, 12:21 AM Thread Starter
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hum in sub

I'm running 2 powered subs via y cable from my Denon 1506 reciever and I noticed left sub has hum in it even when reciever off ,hum goes away if i turn sub in question off or unplug it from power scource what would cause this? also hum goes down if I dial down that subs volume I am puzzled to why any suggestions?
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post #2 of 5 Old 04-27-08, 01:32 AM
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Re: hum in sub

Is this something that just started happening? Or did something change? It sounds like a typical ground loop problem on first blush.

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post #3 of 5 Old 04-27-08, 02:01 AM Thread Starter
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Re: hum in sub

probably always been in there but I noticed it when I raised volune of that sub whats a ground loop?
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post #4 of 5 Old 04-27-08, 05:23 AM
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Re: hum in sub

Here is an article on dealing with audio/video ground loops, complete with diagrams.

http://www.cinemasource.com/articles/gnd_loop.pdf




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post #5 of 5 Old 04-27-08, 04:50 PM
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Re: hum in sub

I agree ... it can be a ground loop

If you don't want to waist time connecting and disconnecting to determine what is causing the hum ... get one of this http://www.radioshack.com/product/in...entPage=search ... connect it between your receiver and subs ... if is a ground loop it will desapear ... ...

One of my subs started humming after I added my Buttkickers amp ... I connected one of this, and problem solved
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