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My Harman Kardon HKTS11 sub woofer just makes a loud 'thumping' noise every coule of seconds when the power is turned on and stays in standby. Any ideas?

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Loud humming noise from subwoofer

if it is a powered sub you should lift the ground. you can do this by adding a three prong to two prong adapter. you know, like when you go to plug something in and the cord your plugging in has three prongs and the outlet your plugging in to only has two. it doesn't have the hole for the ground so you go get a little grey adapter that has three holes on one side and two prongs or tabs on the other.if that doesn't take the hum out (actually, is keeping the hum from getting in) you have a problem with the amplifier.

Posted on Jan 27, 2007

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simplemitch
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SOURCE: bose acousticmass 15 sub-woofer making a noise

The sub contains the amp for the other speakers. But it sounds like the amp has a seriously damaged section and will probably have to be serviced by Bose.

Posted on Aug 05, 2008

ravichetty
  • 158 Answers

SOURCE: The sub has a loud buzzing when turned on (harman

sounds like your audio stage is blown

Posted on Jul 22, 2009

  • 1 Answer

SOURCE: Subwoofer continuous buzz/signal noise

I just bought mine yesterday and have the same problem... did you find a solution (other than throwing it out the window)?

Posted on Dec 27, 2009

  • 3 Answers

SOURCE: sub woofer produces a very loud low tone

I have the same problem. JavaMan is right. In one case someone even reported the bridge rectifier had failed. I have mine apart right now, trying to decide whether to attempt to fix it. The power board has been warped a little from the heat, and I can no longer read the color bands correctly on the power resistors to try to change them. Thanks for the schematics, JavaMan; unfortunately they don't match my boards, so I'm out of luck, and can't find anything else.

The components aren't expensive, so you might be able to take it someplace and have it repaired (or have a friend do it) fairly cheaply if the schematics here match your sub. I think I'm gonna chuck mine, which I hate to do since the speaker and cabinet are still good. I've just wasted too much time on it, and already have another in its place.

Posted on Feb 07, 2010

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1 Answer

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Temp fix: Disconnect the subwoofer wire from receiver for 20-30mins and plug-it back. It did work for couple of months.

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Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Harman-Kardon-AVR-130-Receivers-manual/id/386ci155/t/2/

The receiver must KNOW it has a sub and you must decide how bass is managed among all your speakers and set up relative levels.

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hi,
You can't connect the pre out of your AVR to this sub woofer. Do one thing connect the frond left/ right channel speaker "B" out of harman kardon to the sub woofers left right speaker in put. you can connect the speaker out "A" to your normal left right speakers. Remember to switch Speaker "A" and "B" in ON position in your AVR. Also do one thing go to the speaker setup of AVR and switch OFF (slelect NONE) the sub woofer.This will disconnect the sub woofer pre our and the sub frequency will mix with frond left right channels.
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My HKTS 7 Sub woofer makes no noise,the led burns from amber to blue as normal,and every so often i hear a low rumble noise. The Sub is powered and has 1 cable to the receiver, the fuse is also good.


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