Question about Celestion S10 Subwoofer

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My Celestion S8 subwoofer makes a buzzing noise when plugged into a clean power outlet. This happens even if it isn't connected to the amp. Any thughts?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: Celestion S8 Subwoofer

If the sound source is on a different circuit or plug it produces some kind of a loop (dont know the technical name) Go to radio shack and get a ground loop disrupter that goes on the audio cables right before the speaker and it eliminates that hum.

Posted on Oct 05, 2007

landsend
  • 1066 Answers

SOURCE: subwoofer stopped working

You have a bad connection to the subwoofer.

Posted on Mar 08, 2009

  • 1 Answer

SOURCE: Celestion S8

Voltage regulator output electrolytics (220 uF/16V) heat up and start squealing/making geiger counter noise several minutes after power on. Noise stopped when electrolytics are sprayed with freeze spray. I intend to move the regs to the power amp heat sink (with heat sink greased insulators), add .1 uF tantalum caps to the regs output as close to the regs as possible and replace the 220uF/16V electrolytics with higher voltage units.

Posted on Mar 22, 2009

SOURCE: I have a celestion s80

Dont remember which cap it is , but its 47 uf 35v, on one corner of the board. You can use a slightly bigger value and slightly higher voltage if thats all you can find. Check the two caps next to the voltage regulators, these go as well problem sorted!!!!

Posted on Oct 03, 2010

  • 14 Answers

SOURCE: Subwoofer buzz & rattels & won't play

That might be the woofer itself in the subwoofer, or the ampliifer.

 

5 year warranty on the woofer, one year on the electronics.

 

The woofer can be removed and checked; it should be about 3.4 ohms DCR.

 

Other wise,

 

To find the authorized Harman kardon service center in your area:

 

  • Go to: www.harmankardon.com
  • Click on United States
  • Click on Support at the top
  • Click on Find My Product
  • Enter your Model Number or Select your Product from the drop down list; then  SUBMIT or SEARCH
  • On the list on the left side, click on Service Center
  • Supply your zip code at the next screen, then FIND
  • A list of service centers in your area will come up.

Posted on Nov 23, 2010

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4 Answers

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.

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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Loud buzzing sound


Amp is shot. Will need to be replaced. Not an uncommon complaint on this model.

Dec 02, 2013 | Mirage OMNI S8 Speaker

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S8 makes a very loud vibrating buzzing noise with only the power lead plugged in


Check for ground loops. Also shut off any CFL or LED lamps inthe vicinity.

You may also have an intermittent connection on the input.

There is a lesser chance that there is an internal failure of a capacitor on the amp power supply, but it is a possibility to look at if all the wiring is in place and soundly connected. The S8 has a high gain amp. It will pick up interference from CCFL or LED ballasting supplies it will also be able to pick up other switch mode power supplies. in vicinity of the input cable.

Jan 07, 2012 | Celestion S8 Subwoofer

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My subwoofer constantly makes a steady intermittent buzz sound while plugged in, even while powered off.


If it has a 3 prong plug, try a 3 prong adaptor - where only 2 prongs are plugged in. Sub's should not be grounded. If it still makes a hum noise, the amp circuitry may be compromised. Replace the amp with an equal at www.partsexpress.com

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

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Celestion S8


Most likely there are electrolytic capacitors in the power supply and also possibly in the amp sections that are going high in ESR.

It would be best to test all the caps with an ESR meter and then replace the ones that are out of spec. You have an excellent chance that this will fix the unit.

If you are not experienced at doing electronics servicing, you can give the unit out to a service center to have it fixed.

Jerry G.

Apr 06, 2008 | JBL PB12 Subwoofer

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I would check the electroltyc caps in the power supply They general are in the first part of the power supply and there will be two of them . What they do is filter out transformer hum and help stabalize the circuit. I am not saying this is absolutely the problem but the capcitors are relatively inexpensive, Easy to change. And have a habit of going bad after a couple of years in use.

Aug 22, 2006 | Celestion S8 Subwoofer

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