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I have a Kenwood Subwoofer, SW-305, S/N 00901468, that when the power is one and hooked up there is a loud buzzing sound. No audio comes out of the subwoofer. I have checked and rechecked my conections and they are correct. Can you please advise me on the possible solutions, price, and where to gain the parts to fix my subwoofer? Thank you for your help.

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Please try to replace your RCA plug that connects from your input player to your Kenwood Subwoofer..coz it not have open ground or has no continuety in it

Posted on Dec 06, 2008

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Kenwood has the manual for the subwoofer on their support site. The direct link to the manual is http://kenwoodusa.com/UserFiles/File/UnitedStates/Home/Manuals/sw200.pdf .

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I would check the caps on the power supply. They are rather large electrolytic capacitors that will look like they burst and/or leaking. When these die, the caps ground and the sub will make a loud buzzing sound. If you are handy with a soldering iron you can replace them yourself. Replace them with the same voltage or a little bigger and same with the size.

If the cap. says 16v 4700pF on it, for example, a 20v 5300pF or a 16v 6200mF cap. will work for this application.

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Go to manual setup, selct the subwoofer and set it to Pus.

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yes. A good idea. Kill power to the sub, then unplug and remove everything from the sub. go ahead and plug it in again and check for buzzzz.
That is test one. if you have buzz still, its the sub assembly. bad luck, but not impossible. If the buzz is gone its one of the signals to the sub. They can produce a buzzz without any signal coming from your stereo equipment. Replace the feed line, enjoy! BTW...Kef sure does sound clean. good choice.

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It sounds like your subwoofer acts as a receiver in its own right. Many low-budget home theater systems act this way, and it may in fact have a Dolby Pro Logic II encoder in it. Your best bet is to hook up either the speakers it came with, or purchase speakers from your local audio visual store. Check its power rating per speaker (in watts) in your manual, and purchase speakers that are rated for it.

The "red and white" input you mention are RCA connectors, and should allow you to connect a source to your system. If you have any more specific questions, please post them here.

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Now you need to make sure the Subwoofer Output is turned on. Do this by holding down(AM position) on the control knob(toggle stick) for at least 1 second. Each time the button is pressed, the Subwoofer Output is turned ON/OFF. the display should show "SW ON".

Next, you can go into Audio Control mode(press but do not hold volume button). Keep pressing on the volume knob until "Sub-WLevel" is displayed. Here you can adjust the amount of gain for the Subwoofer ranging from -15 to +15.

I hope this fixes your problem with it.

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"Sub-woofer output not working" problem, and notify you when a new solution is offered.
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