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#385934 - 11/20/12 06:09 PM Hum from Subwoofer
Davidworks Offline
regular

Registered: 11/20/12
Posts: 7
Getting a very loud hum from subwoofer. EP 500 connected to a Denon 3808CI. I am guessing its a ground loop, and wondering the best suggestion for a fix.....thanks

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#385936 - 11/20/12 06:50 PM Re: Hum from Subwoofer [Re: Davidworks]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13345
Loc: Iowa
is the subwoofer plugged into an outlet on the same AC circuit as the other components? It also can be a result of other equipment in the mix, for ex., direct tv receiver.
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#385937 - 11/20/12 07:12 PM Re: Hum from Subwoofer [Re: Davidworks]
Davidworks Offline
regular

Registered: 11/20/12
Posts: 7
I haven't hooked up cable or satellite yet. I may try the extension cord route, try a different outlet. Almost wondered if it could be Rogers internet running through Boxee. I was just doing a little reading and could be the amp and the sub fighting for 0.00 volts.

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#385939 - 11/20/12 07:24 PM Re: Hum from Subwoofer [Re: Davidworks]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13345
Loc: Iowa
is there a hum when just plugged into outlet, and no coax, or just when you introduce the line in coax?
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#385941 - 11/20/12 07:30 PM Re: Hum from Subwoofer [Re: Davidworks]
Davidworks Offline
regular

Registered: 11/20/12
Posts: 7
with coax, and the hum stops and starts when switching inputs/signals on the receiver, say from Boxee to PS3.

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#385942 - 11/20/12 07:37 PM Re: Hum from Subwoofer [Re: Davidworks]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13345
Loc: Iowa
My 600 did that as well, and I removed the gound screw on the back, which was an option back in the V2 series, not sure the 500 has that on that back, hmmm. If you unhook other equipment from receiver, and add them back one by one, I wonder if one of those items is causing the issue. Possibly the HDMI on the Ps3. Ground Hums suck.
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#385949 - 11/20/12 08:33 PM Re: Hum from Subwoofer [Re: Davidworks]
Davidworks Offline
regular

Registered: 11/20/12
Posts: 7
I tried pulling all the inputs, still no luck. I'm going to guess that a new/better power bar won't do the trick. hard to find a separate circuit in the same room.

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#385977 - 11/21/12 08:36 AM Re: Hum from Subwoofer [Re: Davidworks]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 17811
Loc: NoVA
If there's nothing hooked up to the sub except power and it still hums, it's not a ground loop. Call Axiom.
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I am the Doctor, and THIS... is my SPOON!

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#385984 - 11/21/12 10:00 AM Re: Hum from Subwoofer [Re: Davidworks]
Davidworks Offline
regular

Registered: 11/20/12
Posts: 7
it only hums hooked up to coax going to the amp.

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#385985 - 11/21/12 10:04 AM Re: Hum from Subwoofer [Re: Davidworks]
cb919 Offline
connoisseur

Registered: 02/17/09
Posts: 1041
Loc: Ottawa, Canada
See if you can ground the Rogers to the main house or other available ground. I had the same issue from Rogers and solved it by grounding my main Rogers coax coming into the house at the demarcation point.
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Dan
In/On Wall 500 w M2 Center Channel

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