Re: EP500 HUM
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Joined: Feb 2009
Posts: 33
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Hi Dr House, yes I tried every outlet in my apartment and even unplugged all other electrical equipment when I did. I've tried two AMPs from Axiom with the same result.
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Re: EP500 HUM
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Joined: Feb 2009
Posts: 33
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Hi EFalardeau, unfortunately I would have to buy an UPS to try this option. Whats your though on an AC filter between the outlet and the EP500?
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Re: EP500 HUM
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Joined: Feb 2009
Posts: 33
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I read on the Polk audio forum about "transformer lamination noise" and is caused by the building and collapsing magnetic field that surrounds the core laminations of the AC power transformers. Does anyone have experience in this field? Could the EP500 be picking this up from the AC outlet. It was mentioned in an earlier post to try at work your the neighbors place. Both are not possible but there is a audio store near me that may let me try plugging in the Sub there. That will be a few days away though.
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Re: EP500 HUM
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Joined: May 2002
Posts: 10,654
shareholder in the making
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shareholder in the making
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Dragon, to clarify a point, although you did say earlier that it was a "transformer like" humming noise, is this actually a humming electronic sound coming from the driver or a mechanical hum coming from the amplifier itself?
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Enjoy the music, not the equipment.
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Re: EP500 HUM
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Joined: Aug 2007
Posts: 3,488 Likes: 9
connoisseur
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connoisseur
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AC filter like a Belkin power conditioner? I am not a big fan of these things even if I do own one (it makes a nice unit-friendly power bar. I got it to try to help my own ground loop problem and it did not. In your case, you might want to try given your distance.
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Re: EP500 HUM
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Joined: Feb 2009
Posts: 33
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Hi JohnK, it's an electronic sound coming from the driver.
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Re: EP500 HUM
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Joined: Feb 2009
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EFalardeau, so a AC filter is a power conditioner? I'm normally a plug it into the wall and everything just works kind of guy, but since still is my first hifi problem I've had to read more about conditioners and electronic stuff...it's like being back at school hahaha
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Re: EP500 HUM
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Joined: Aug 2007
Posts: 3,488 Likes: 9
connoisseur
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EFalardeau, so a AC filter is a power conditioner? That was a question, not an answer... You mentionned an AC filter and I asked if meant a power conditioner or something else that would be called an AC filter with which i'm unfamiliar (we ALL learn!). Hopefully things will get resolved soon enough for you. This is the type of problems that can quickly build up into a lot frustration.
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Re: EP500 HUM
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Oh sorry EFalardeau yes I see it was a question. AC filter is nothing I came across when I was searching the net for answer on the topic. From what I understand an AC filter is a small box (like an adapter plug) that is meant to block out magnetic interference coming through the AC outlet. It plugs directly into the AC outlet, then your component plugs into the filter. Only thing is I've not seen anything like that in Japan. Yeah it's frustrating but step by step I'll conquer this problem. Everyone's input here is very helpful.
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Re: EP500 HUM
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Joined: Jun 2007
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If there's a possibility that it's not the subwoofer and possibly an electrical problem, can you try it at a friends or family members house?
I could be way off base, I didn't read through the entire thread.
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