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#199894 - 03/11/08 11:39 AM EP600 / Please Explain Grounding - Again
michael_d Offline
connoisseur

Registered: 07/23/04
Posts: 3904
Loc: Up yonder

I know, it’s been covered many times and I didn’t think I had a problem, so I didn’t read the posts.

The other day I was re-routing some cables and noticed that the EP600 would “thump” every time I connected / disconnected one of my components. My video processor (DVDO VP50Pro) uses a 120V AC – 6V DC power converter. Whenever I plug / unplug this, the sub thumps. It does not ever thump unless I plug / unplug this particular component. I’m not sure what’s causing this or why. The VP is downstream from my receiver and the only thing that is plugged into it is the HDMI output from the receiver and the SDI output from my Oppo 981. The 981’ s audio goes directly to the receiver via Coax.

I asked this question at the master VP50Pro thread at AVS, and one guy told me it is a ground problem and I should remove the 120V AC ground prong that is on the sub's plug. That doesn’t sound like a very elegant solution, if it is a ground problem.
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#199895 - 03/11/08 11:44 AM Re: EP600 / Please Explain Grounding - Again [Re: michael_d]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13337
Loc: Iowa
This could be totally off, but would removing the ground screw on the back of the 600 help?
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#199896 - 03/11/08 11:46 AM Re: EP600 / Please Explain Grounding - Again [Re: michael_d]
Wid Offline
axiomite

Registered: 06/22/03
Posts: 6720
Loc: The Peoples Republic of Il.
That doesn't sound like a ground problem Mike. As a matter of fact I believe that would be normal. If I unplug my power center before shutting down the sub it too will make a thumping sound. Don't worry about it.
_________________________
Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud


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#199897 - 03/11/08 11:51 AM Re: EP600 / Please Explain Grounding - Again [Re: Wid]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13337
Loc: Iowa
I leave my subs on all the time and never hear any noise/thump when turning off my equipment. Now, when I unplug my preouts from my receiver when everything is powered on, I sometimes hear a thump from my 80's that are hooked up to my Odyssey amps.
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#199898 - 03/11/08 11:55 AM Re: EP600 / Please Explain Grounding - Again [Re: SirQuack]
Wid Offline
axiomite

Registered: 06/22/03
Posts: 6720
Loc: The Peoples Republic of Il.

But do you hear it if you UNPLUG your processor while the sub is on?
_________________________
Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud


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#199899 - 03/11/08 11:59 AM Re: EP600 / Please Explain Grounding - Again [Re: Wid]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13337
Loc: Iowa
Not sure I've ever had a need to do that....hold on.....ok, I just tried it and unplugged my Denon, no noise or thump.
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#199900 - 03/11/08 12:01 PM Re: EP600 / Please Explain Grounding - Again [Re: SirQuack]
Wid Offline
axiomite

Registered: 06/22/03
Posts: 6720
Loc: The Peoples Republic of Il.

Mine does.
_________________________
Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud


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#199901 - 03/11/08 12:05 PM Re: EP600 / Please Explain Grounding - Again [Re: Wid]
St_PatGuy Offline
axiomite

Registered: 03/07/05
Posts: 7405
Loc: Glendale, Arizona
When I unplug my Hsu directly I get a series of diminishing thumps like the amplifier is getting rid of stored energy. I don't think I've ever had it happen while unplugging something else, but then I usually turn the power off on all components when I switching stuff around.
_________________________
***********
"Nothin' up my sleeve. . ." --Bullwinkle J. Moose

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#199908 - 03/11/08 12:44 PM Re: EP600 / Please Explain Grounding - Again [Re: St_PatGuy]
michael_d Offline
connoisseur

Registered: 07/23/04
Posts: 3904
Loc: Up yonder
It's odd. If the VP50Pro is turned off, it makes no difference. The sub will still thump when I plug / unplug it. It isn't the 120V wall jack either, only at the 6V DC side.
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#199910 - 03/11/08 12:57 PM Re: EP600 / Please Explain Grounding - Again [Re: michael_d]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13337
Loc: Iowa
If I unplug my 600, I do get a little thump as Sean mentioned.
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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