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#282246 - 12/13/09 03:10 AM New EP500 makes hissing sound when system off
rvrrat Offline
buff

Registered: 08/22/09
Posts: 57
Loc: Iowa, USA
My EP500 is 2-3 months old. My EP500 sometimes makes a slight hissing sound when my system is off. This is not a hum but a noise that sounds like when you put your ear to a sea shell. It does not change when I move the volume control or switch the subsonic filter or phase switch. It goes away when I turn the crossover knob all the way down to 40 HZ and get progressively louder as crossover knob is turned up toward 150 HZ. This sound is not comming from my system as it remains when I pull off the sub cable. If I switch off the power and then turn it back on the sound goes away and the sub remains quiet until some time later.

Has anyone else experienced this and if so what was the resolution?


Edited by rvrrat (12/13/09 03:36 AM)

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#282251 - 12/13/09 09:11 AM Re: New EP500 makes hissing sound when system off [Re: rvrrat]
terzaghi Offline
connoisseur

Registered: 04/04/07
Posts: 4870
Loc: Tulsa, Oklahoma
hmmmm... try calling axiom. Maybe need a new amp?
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-David

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#282252 - 12/13/09 10:18 AM Re: New EP500 makes hissing sound when system off [Re: terzaghi]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13579
Loc: Iowa
Hmmmm Steve,

Interesting...do you have to get real close to the sub to hear it, or can it be heard from the seating area? I used to have a similar problem when I had my subs plugged into a different outlet in the room on a different circuit from my other stuff. I think I could even hear the sound coming from the other speakers.

As soon as I plugged the sub into a different outlet on the same HT circuit it went away. Does your 500 have a ground screw on the back amp plate, if so you could try removing that and see if that helps, but that is normally for ground hummm.

The only other option would be to call the Axiom tech 800 line, Brent, JC, and the others answer that until the evening hours...
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#282258 - 12/13/09 11:30 AM Re: New EP500 makes hissing sound when system off [Re: SirQuack]
BlueJays1 Offline
connoisseur

Registered: 09/19/08
Posts: 4116
Loc: Porch,enjoying Bombay Sapphire
Wierd problem and it is intermittent. It is not a ground loop since it still occurs when the sub is not connected to the system. You should call 1-866-244-8796 and talk to the customer support staff or one of the engineers to see what they have to say about this issue. I suspect there might be problem with the amp. Keep us posted.
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I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

-Max Payne

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#282271 - 12/13/09 02:04 PM Re: New EP500 makes hissing sound when system off [Re: BlueJays1]
CatBrat Offline
axiomite

Registered: 08/05/09
Posts: 6015
Loc: Milky Way Galaxy
Try opening it up and letting the snake out.

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#282277 - 12/13/09 02:35 PM Re: New EP500 makes hissing sound when system off [Re: CatBrat]
CV Offline
Founder, Axiom Upgrade Club
shareholder in the making

Registered: 07/20/06
Posts: 11694
Loc: Richland, WA, USA
That's what she said.

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#282300 - 12/13/09 09:43 PM Re: New EP500 makes hissing sound when system off [Re: CV]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10634
Good one, Charles.

Steve, as others have pointed out, if the problem exists with no connection to other equipment, a ground loop can't develop and the problem appears to be internal to the sub. Contact Axiom directly since a defect in the sub amplifier may have developed and it needs to be replaced.
_________________________
-----------------------------------

Enjoy the music, not the equipment.



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#282434 - 12/14/09 07:56 PM Re: New EP500 makes hissing sound when system off [Re: JohnK]
rvrrat Offline
buff

Registered: 08/22/09
Posts: 57
Loc: Iowa, USA
Update: Talked to Brent at Axiom and he also thought amp was the issue and is sending me a new one. Thanks everyone for feedback. I will keep you posted on fix.

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#283595 - 12/23/09 06:50 PM Re: New EP500 makes hissing sound when system off [Re: rvrrat]
rvrrat Offline
buff

Registered: 08/22/09
Posts: 57
Loc: Iowa, USA
Received and installed new amp today. So far so good. I will reserve judgement for awhile as problem with old amp was intermittent.

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#283596 - 12/23/09 06:51 PM Re: New EP500 makes hissing sound when system off [Re: rvrrat]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13579
Loc: Iowa
Good luck Steve, let the Rumbling begin..
_________________________
M80s-VP180-4xM22ow-4xM3ic-EP600-2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB SonyUBPX800



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