Question about KLH ASW10-120 Subwoofer

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Subwoofer interferance just moved to new state and when i hooked up my system my subwoofer began picking up mexican radio stations even if it was not hooked up and only pluged in it keeps playing music at a low but noticable volume. Why? How do i fix it?

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Re: subwoofer interferance

Sounds like you've got a floating ground wire on your wall outlet, or you're plugging the sub into a different circuit from the receiver.
Make sure your sub and receiver are plugged in to the same circuit (ideally, the same outlet) and if you still have the problem then you need an electrician to test/fix your ground wiring.

Posted on Jun 15, 2009

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True subwoofers of actual operating design are not meant to carry signal frequency that will reach into the range required to play back human voice, in the 400-500Hz range it becomes audibly recognizable as human mediated. Down to even around 80Hz there are some fundamentals of the human voice frequency range that your system would play back, but you shouldn't be able to hear it separately when all is working properly.
Since you are hearing this noise and are able to recognize what it is, I'm going to assume two things;
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My second assumption is based solely on the fact of how in systems such as yours, bass management circuitry works. Noise from an outside source will bypass that circuitry. Intended sources such as what you have plugged into the system will run through that circuitry and you'd hear it through the satellite speakers instead of how you're hearing it right now.
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Power source. Plug it into an outlet on a different circuit. Finding an alternate circuit is easy; go to your electrical switch panel and turn off one switch at a time starting with the switch that controls the outlet power to your current connection. If it turns off but then you still have another device in the same room that has power, plug it into the same outlet for THAT device. The general idea is to get your electronics isolated from circuits that have such devices powered on it like fluorescent lighting, refrigerators, freezers, microwaves, fans, cathode ray-tube (old) TV's or anything with an electric motor in it especially.

If moving it does not provide satisfaction, I recommend an AC line power conditioner with noise suppression like from Tripplite, plus a series of what is called ferrite clamps. Both of these items can be found at Radioshack. Place the ferrite clamps on the power cord of your system. Keep in mind the diameter of the cord size when choosing your clamp design; if the clamp is not tight it will not work. You can also place these clamps on any device in your home circuit that would PRODUCE the noise and introduce it back into the circuit for your system to pick up. So if for example, your ferrite clamp would fit better on the power cord of the only device in the circuit that may pick up the RFI and pass it to your JVC system, then try it out. It usually takes more than one clamp in series on a single power cord for higher powered items though.

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Salutations valikan,

It sounds like you may have some basic interference either in your power, or other sources. I have something similar when my sub is not in use I pick up talk radio, it drove me in sane for months untill I figured it out.

There are a few things you can do to help eliminate interference would be to purchase a surge protector with a power "filter" or conditioner. Also check the cabling to your sub-woofer if there are any breaks or weak spots in the insulation this could be causing interference as well.

And as always if possible read through your owners manual to see if there are any adjustments that can be made on your sub-woofer it self.

Hope this helps.
Go Ahead. Use Us.

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