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#273617 - 09/29/09 10:01 PM Is this normal
SylBer Offline
frequent flier

Registered: 08/03/09
Posts: 14
I have been using my new EPIC 80/350 for a couple of weeks now. I noticed that all my speakers make a certain "buzzzzzzzzzzzz" sound when I pause the movies. I don't know if this is normal or not? What could caus this? If not, is there anything I can do about it? Thanks in advance for your advices.

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#273620 - 09/29/09 10:10 PM Re: Is this normal [Re: SylBer]
fredk Online   happy
axiomite

Registered: 12/06/07
Posts: 7217
Loc: Canada
Nope, its not normal. It could be a ground loop. I don't have any experience here, so I will let someone more knowledgable answer further.
_________________________
Fred

-------
Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!

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#273622 - 09/29/09 10:37 PM Re: Is this normal [Re: SylBer]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10411
Syl, is this noise only present when movies are paused by you? Is it present during pauses inherent in music or in the movie sound other than when you specifically pause it? A ground loop hum/buzz would be audible during quiet moments in all source materials. If it's only during a paused movie, it would seem that the player is at fault.
_________________________
-----------------------------------

Enjoy the music, not the equipment.



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#273624 - 09/29/09 10:46 PM Re: Is this normal [Re: JohnK]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13344
Loc: Iowa
Syl, how loud is the sound, and how close are you when you notice it? Most speakers will have a very soft buzzing (or power) sound when the receiver is turned on, however, you usually have to be pretty close (1ft or less) to hear it, it would not be audible from the seated position.

A ground loop buzz is pretty audible. If you think of how a tranformer on a power pole sounds, buzzzzzzz/hummmmmmmmm, if your close to one, that is what is sounds like.
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#273668 - 09/30/09 10:01 AM Re: Is this normal [Re: SirQuack]
Zimm Offline
connoisseur

Registered: 12/08/08
Posts: 1361
Loc: New Orleans
To defeat, try to move your wire bundle around while you can hear the buzz. If it changes, its a ground loop. I had a Sony DVD that caused a loop in my system. Once I isolated the cable, then excluded the cable as the problem, the DVD player was the only option. Replaced it, and no more buzz. Also, old wires that have cracked due to many un/plug cycles can make noise.

In short, make the sound, and unplug equip until it goes away. Start with the cable line (the most notorious cause). If it is the cause, you can buy a solution from Axiom or others. Sometimes, just rearranging the wires can fix it.
_________________________
Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire

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#273670 - 09/30/09 10:21 AM Re: Is this normal [Re: Zimm]
SylBer Offline
frequent flier

Registered: 08/03/09
Posts: 14
From what I hear, it is probably a ground loop. The buzz is indeed very loud. I can clearly ear it from the seating position wich is on average 8 to 10 feets from the speakers. If it is ground loop, is it normal to ear thissound in each of my speakers? Finally, the cables used were a little long and I decided to roll them together instead of cutting them. I figured I could use this extra lenght if I ever decide to moove the speakers. I guess I should cut the cables to the right lenght and make sure there is no loop in them. Thanks for your help. I'll kepp you posted.

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#273671 - 09/30/09 10:35 AM Re: Is this normal [Re: SylBer]
alan Offline
connoisseur

Registered: 01/29/02
Posts: 3191
Loc: Toronto/New York/Dwight
Hi SylBer,

It's almost certainly a ground-loop hum, and you'll hear it in all the speakers plus the subwoofer. Here's my guide to eliminating the hum with links to devices that will help you get rid of it:

http://www.axiomaudio.com/tips_eliminate_hum.html

Disconnect the cable-TV feed (or satellite-TV feed) from the cable box or satellite box and see if the hum goes away. It does not matter whether the box is turned on or off.

Regards,
Alan
_________________________
Alan Lofft,
Axiom Resident Expert

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#273672 - 09/30/09 10:37 AM Re: Is this normal [Re: SylBer]
Chevy Offline
old hand

Registered: 07/31/09
Posts: 95
Loc: Sherbrooke Qc Canada
this is absolutly not normal,
there is a open loop ground on the electrical circuit, i had few yesr ago the same problem, after a long investigation, we found that it was a ground problem on my HOME ELECTRICAL CIRCUIT !!!
, so i can suggest you before blame your equipment, check your home circuit. (by deduction, plug it elsewhere on the home).
_________________________
Cambridge Audio 640r,M100,VP150v3,QS8v3,EP500v3

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#273674 - 09/30/09 10:46 AM Re: Is this normal [Re: Chevy]
SylBer Offline
frequent flier

Registered: 08/03/09
Posts: 14
Thanks Alan for the link. Chevy, I am not blaming the equipement and it will be difficult to blame my electrician, he is my father. I'll try to follow the advices in Alan's paper and see what happens. Also, I live right next to you in Magog. If you agree to send me a private message with your telephone number, I could call you sometimes for advices?

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#273678 - 09/30/09 11:03 AM Re: Is this normal [Re: SylBer]
alan Offline
connoisseur

Registered: 01/29/02
Posts: 3191
Loc: Toronto/New York/Dwight
Hi,

Sure, and as Chevy pointed out, ground-loop hum can originate from a combination of factors. In my own case, with an EP500, I was able to eliminate the ground loop buzz by using an AC outlet that was on an entirely different electrical circuit than my AV receiver, TV, DVD player, cable box, etc. Sometimes the reverse of that will work--connecting all the components to a power strip so they are on the same circuit. But in my experience, about 90% of ground-loop buzz complaints originate with the cable-TV feed.

Years ago, I once fixed a ground loop hum for a reviewer acquaintance but I had to run a separate ground wire from the chassis of his McIntosh power amplifier to a cold-water pipe under the basement/bar sink. He used to have a show on CBC-Radio (English network) called "Gilmour's Albums". I cite that to show the various solutions that sometimes work.

All ground-loop problems are solvable--it just takes some careful detective work.

Alan
_________________________
Alan Lofft,
Axiom Resident Expert

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