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zach stimson
zach stimson Posted on Mar 09, 2008
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Subwoofer noise Sub suddenly makes loud buzzing sound and air blows through hole in bottom of sub when stereo/home theater system is off. Sub works fine when stereo/home theater system is on.I have tried turning sub off and back on, **ise comes back eventually. I have tried uplugging power supply at sub and receiver to reset, ** luck!

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  • Anonymous Mar 22, 2014

    What is the sequence for removing the screws on the back of the DPS10? I have a loud buzz unless downward pressure is applied to the connection of the RCA cable. I think it is a grounding issue with the connectino inside the sub. I removed all of the wood screws from around the back panel and 4 smaller screws but the panel wont come off.

  • Anonymous Mar 30, 2014

    Sub intermittently makes a clicking kind of noise. Tried unplugging for a day and came back after 5 min of being plugged back in. Does it even in standby.

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  • Contributor 56 Answers
  • Posted on Mar 10, 2008
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You didn't say is your sub active or passive.If its active first check signal cables from theater system,power line of the sub, it has to be the same phase as the system.If its passive take a voltmeter disconnect the sub from the system and measure for DC voltage on the SUB output on the system when its OFF.If DC voltage is present your amp is damaged.It can also be that the preamp circuit for the sub doesn't mute the input when unit is on stand by and you hear frequency of your power supply (50-60Hz) on the sub

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Klh powered subwoofer model ASW10-120B... when you plug in to power... it makes a loud buzzing/humming noise
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.

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