Question about JBL PB10 Subwoofer

Open Question

JBL PB10 Subwoofer that makes loud hum/crackle noises.

I reviewed similar problems on this site, but didn't see a helpful response. I'd like fix it myself if parts are available and reasonably priced, so any assistance there would also be appreciated. Thanks.

Posted by on

5 Suggested Answers

  • 20 Answers

SOURCE: PB10 Loud Hum and Crackle- LED Lights mixed Red/Green

Hello, Jesse. I doubt I can help, but there is at least one SIMPLE thing you can try - with maybe a 10% chance it wil return your unit to normal: Unplug the unit for 30 seconds, then plug it back in to a DIFFERENT outlet. Oh, yes - there are NO fuses or other "reset" devices. I'm sorry I couldn't offer you more help.

Posted on Jul 26, 2007

renosean
  • 492 Answers

SOURCE: Thump at the time of shutoff

The amplifier in the sub as with any other amplifier has a capacitor in it. Essentially a battery that holds a charge. When you trun things off such as subs or amps with a powerstrip instead of the intended on off button, the power supply has been cut, but the capacitor is still energizing the unit. So it catches the noise in the line.

Posted on Mar 08, 2008

blueextc3221
  • 15935 Answers

SOURCE: JBL PB10 subwoofer, it makes a loud burp noise when it comes on.

In the industry - It is called "Turn-On Thump".

There are some manufacturers that eliminate components like noise filters on enry level lines to save money.

There is no way to lessen this noise without ripping the amplifier apart and having a technical knowledge of the way amplifiers work. It would involve hard-wiring a slow charge capacitor in the turn on line so it gradually builds power instead of getting it all at once.

Thanks for using FixYa - a FixYa rating is appreciated!!

Posted on Feb 10, 2009

budmrtn
  • 11361 Answers

SOURCE: JBL PB10 subwoofer sounds distorted and lights on the front flash

More likely to be the Class D power amp module, but you should look through the service manual to make sure all the parts are installed correctly. My PB10 AMP module went out and you cannot get one anymore.
http://manuals.harman.com/JBL/HOM/Service%20Manual/PB10%20sm.pdf

Posted on Nov 10, 2009

budmrtn
  • 11361 Answers

SOURCE: jbl pb10 subwoofer will not come on, that is the

Download service manual here:
http://manuals.harman.com/JBL/HOM/Service%20Manual/PB10%20sm.pdf

Posted on Nov 10, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

When I plug it up it makes a loud buzzing humming sound that's unconteollable with the volume.


Buzzing is usally AC line noise leaking into an un-shielded cable somewhere or a floating ground. If the AC plug is reversable, try that. make sure all audio cables are pluh\gged in tightly at each end and routed away from or at right angles to any power cords and away from other sources of strong magnetic fields like TV's. I've also seen variable track lights induce noise but it's usually minor.

If it still does it with no cables attached it's an internal amp problem.

Dec 31, 2010 | JBL PB10 Subwoofer

3 Answers

JBL PB10 subwoofer sounds distorted and lights on the front flash


More likely to be the Class D power amp module, but you should look through the service manual to make sure all the parts are installed correctly. My PB10 AMP module went out and you cannot get one anymore.
http://manuals.harman.com/JBL/HOM/Service%20Manual/PB10%20sm.pdf

Nov 10, 2009 | JBL PB10 Subwoofer

1 Answer

JBL PB10 subwoofer, it makes a loud burp noise when it comes on.


In the industry - It is called "Turn-On Thump".

There are some manufacturers that eliminate components like noise filters on enry level lines to save money.

There is no way to lessen this noise without ripping the amplifier apart and having a technical knowledge of the way amplifiers work. It would involve hard-wiring a slow charge capacitor in the turn on line so it gradually builds power instead of getting it all at once.

Thanks for using FixYa - a FixYa rating is appreciated!!

Feb 10, 2009 | JBL PB10 Subwoofer

1 Answer

Thump at the time of shutoff


The amplifier in the sub as with any other amplifier has a capacitor in it. Essentially a battery that holds a charge. When you trun things off such as subs or amps with a powerstrip instead of the intended on off button, the power supply has been cut, but the capacitor is still energizing the unit. So it catches the noise in the line.

Mar 07, 2008 | JBL PB10 Subwoofer

2 Answers

Jbl subwoofer


There is actually some good news.  I had this problem with my PB10s (1 have 2 PB10s and 2 PB12s) It is one of 2 things, the first is that it could be a capacitor and resister combination on the amplifier board (which was the fix for our PB10 with the same problem), or 2nd, the AMP IC, which is not available for the PB12. hmmm

Sep 10, 2007 | JBL PSW-D112 Speaker

2 Answers

PB10 Loud Hum and Crackle- LED Lights mixed Red/Green


Hello, Jesse. I doubt I can help, but there is at least one SIMPLE thing you can try - with maybe a 10% chance it wil return your unit to normal: Unplug the unit for 30 seconds, then plug it back in to a DIFFERENT outlet. Oh, yes - there are NO fuses or other "reset" devices. I'm sorry I couldn't offer you more help.

Jul 25, 2007 | JBL PB10 Subwoofer

Not finding what you are looking for?
JBL PB10 Subwoofer Logo

Related Topics:

338 people viewed this question

Ask a Question

Usually answered in minutes!

Top JBL Speakers & Subwoofers Experts

Michael Edwards
Michael Edwards

Level 1 Expert

53 Answers

 Grubhead
Grubhead

Level 3 Expert

4576 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a JBL Speaker and Subwoofer Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...