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#321525 - 09/06/10 03:08 PM the dreaded vibration is back on the ep800
majik Offline
local

Registered: 09/28/08
Posts: 289
So as some of you know, I had a problem a while back with the 800 "vibrating" as soon as I plugged the cable in. Then I brought it back to Axiom to have it fixed and while I was there to pick it up the vibration was still there just not as evident. When I got home and plugged it in though, all was great - no vibration and the sub worked as expected (even better than expected).

Well, I moved recently and plugged in the sub connected the cable and... it's back! and then when I turned the power on to the Denon3808 it was REALLY back... a loud continuous hum from both woofers... and vibration from both (feel it when you touch it)...

Don't know what to do... tried different outlets, but I think there all connected on the same line anyway... but I really don't think that's it because at the last place I used the same outlet before and after and someway, somehow the problem went away.

Any suggestions?
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- Majik

Epic 80 system
Ep 800
Denon 3808
Optoma HD20
PS3
vp180
extra QS8s (to come soon)

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#321526 - 09/06/10 03:12 PM Re: the dreaded vibration is back on the ep800 [Re: majik]
Adrian Offline
axiomite

Registered: 12/27/08
Posts: 6894
Loc: It's all about the location.
Is it a ground loop humm?
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#321527 - 09/06/10 03:12 PM Re: the dreaded vibration is back on the ep800 [Re: majik]
MarkSJohnson Offline
shareholder in the making

Registered: 09/27/04
Posts: 11444
Loc: Central NH
It's a ground loop issue.

Temporarily...........plug the sub into an outlet without the ground plug being used (Usually, using a 3-to-2 prong adapter) and see if it goes away.


Edited by MarkSJohnson (09/06/10 03:13 PM)
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#321528 - 09/06/10 03:14 PM Re: the dreaded vibration is back on the ep800 [Re: MarkSJohnson]
BlueJays1 Offline
connoisseur

Registered: 09/19/08
Posts: 4116
Loc: Porch,enjoying Bombay Sapphire
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#321529 - 09/06/10 03:27 PM Re: the dreaded vibration is back on the ep800 [Re: majik]
majik Offline
local

Registered: 09/28/08
Posts: 289
Something of note... when I disconnect the sub cable from the back of the Denon... the vibration stops of course... BUT if I am still touching any metal part of the denon while I holding the plug in the other hand the problem vibration and humming are still present.

Could it be a setting in the denon?
_________________________
- Majik

Epic 80 system
Ep 800
Denon 3808
Optoma HD20
PS3
vp180
extra QS8s (to come soon)

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#321530 - 09/06/10 03:48 PM Re: the dreaded vibration is back on the ep800 [Re: majik]
majik Offline
local

Registered: 09/28/08
Posts: 289
Thanks Mark,

I checked the site out. I know it's not the cable because the cable is running in completely different room nowhere near the setup.

I really believe it's the denon... gonna try to hook it up to the onkyo and see if it'll make a difference

nope... it's there with the onkyo as well. Back to the drawing board... ARRRRGHHHHH! lol!

what to do? what to do?...

Don't you just hate when things don't "just work"! lol!





Edited by majik (09/06/10 04:03 PM)
_________________________
- Majik

Epic 80 system
Ep 800
Denon 3808
Optoma HD20
PS3
vp180
extra QS8s (to come soon)

Top
#321533 - 09/06/10 04:10 PM Re: the dreaded vibration is back on the ep800 [Re: majik]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13579
Loc: Iowa
Are the subs plugged into the same outlet, or other outlets on the same circuit? I had a similar problem once, as soon as I used an outlet on the same circuit, no issue. Does the 800 have a ground screw like previous EP models?
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#321534 - 09/06/10 04:25 PM Re: the dreaded vibration is back on the ep800 [Re: SirQuack]
majik Offline
local

Registered: 09/28/08
Posts: 289
yes it does, but I removed it and it's in one of my boxes. can't locate it...

The subs and the denon are plugged in different outlets but I'm pretty sure they are on the same circuit as the outlets are on the same wall (but I don't know much about electricity so...).

The thing that gets me is when I had this problem before I have no idea what changed that solved the problem.

eeesh... I did not want to have to deal with this issue now... cause I won't rest until I have it solved. Which means the unpacking is now put on hold! oh well...
_________________________
- Majik

Epic 80 system
Ep 800
Denon 3808
Optoma HD20
PS3
vp180
extra QS8s (to come soon)

Top
#321535 - 09/06/10 04:30 PM Re: the dreaded vibration is back on the ep800 [Re: majik]
ClubNeon Offline
connoisseur

Registered: 02/06/09
Posts: 3466
Loc: Western Maryland, USA
Do you have a power strip, so you can plug everything into one wall outlet?
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#321537 - 09/06/10 04:46 PM Re: the dreaded vibration is back on the ep800 [Re: ClubNeon]
grunt Offline
connoisseur

Registered: 12/04/06
Posts: 3569
Loc: Nirvana
The fact that when you ground the plug with your body to the Denon causes the humming to return pretty much confirms Marks assertion that you have a ground loop issue. I would follow the guidance in the link provided by the doc to figure out what is causing it only then can you apply the best solution.
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