Question about JBL PSW-D112 Speaker

2 Answers

Jbl subwoofer I have a jbl 12 inch front firing sub and it stays in the auto on mode and started a loud humming noise when sytem is not on and no signal being sent to sub. turned on and stays humming noise with a little sound. I am not sure what to check for but think it must be amplifier problem. please help and I can try

Posted by on

  • jaredr505 Nov 23, 2008

    Same problem...Annoying hum. How do I go about figuring out which problem it is? And more importantly, how do I fix it?

  • Anonymous Feb 05, 2009

    mines the 15 and only makes a loud hum when powered up, I dont use it now that its broken... I would like to fix it but dont know where to start



2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have an jbl acr 10 sub, which blowes the 0.62 sb fues instantly. Could it possibly be the pair of 3300uf @ 50v gone bad?

Posted on Sep 04, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

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

Posted on Oct 31, 2007


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

12 inch sub(JBL) in box with a 500 watt pioneer amp, sounds good with some types of base. would you cut a port hole in speaker box?

riverray1969 it would help if I knew the exact model number of that JBL sub you are referring to. With that info I can provide exact specs.

Basically, you need to build/modify an sub enclosure that is suited for the sub, the music you mainly play, and vehicle tuning. Generally, sealed enclosures will provide tighter bass response and get decently loud. Some would argue that it will give you greater sound quality. A ported enclosure will give you a louder more booming sound. That depends also on where the port is tuned (ex. 32 hz, 36 hz, etc ). You need to make sure that the enclosure meets the sub's airspace requirement as well. A customized well made enclosure is just as important as the sub you put in it.

Oct 16, 2012 | JBL P-1020D Car Subwoofer

5 Answers

JBL sub PSW-D110 hums, and the fuse is blown

here is the manual, I am looking for a more detailed version

Mar 25, 2008 | JBL PSW-D110 Speaker

2 Answers

Subwoofer makes loud hum noise

4 possibilities:
1) ground loop or open connection on input.
2) close proximity to a CFL, or other flourescent fixture.
3) bad filter caps in the sub.
4) bad coax to the sub.

in any event, check wire routing. You can also track down the noise sources by using a portable AM radio tuned off station. it will pick all manner of RF noise around the house. Light dimmers are notorius noise makers.

Dec 20, 2011 | Audio Players & Recorders

1 Answer

Jbl 12 subwoofer loud noise

Hiya, could be the power supply or possibly the amp circuit that has gone. If there are electronic guys in your area, they should be able to sort it out relatively easily. Get a quote first, make sure it is in economical repair as well, but it can be repaired

Jul 09, 2009 | JBL PB12 Subwoofer

1 Answer

My jbl sub 300 has developed a loud humming noise

could be the woofer but it is probably the amp. better bring it to a service center for evaluation.

Jun 06, 2009 | JBL ESC-300 Speaker

1 Answer

JBL d110 /w no sound output

There is a standby indication that activates after 10-15 minutes without any input signal. I suspect that might be what the red light is telling you - no signal.

Loud hum from a loosened cable is normal as hum usually means there's an ungrounded connection somewhere acting as an antenna and the amp is doing its job to amplify what it thinks is a signal, in this case 60hz stray ac current is being sensed nearby. It's a good sign that you get hum from the sub because that means the amp is alive.

Avoid manipulating cable connections with the Sub or Receiver turned on as you could introduce a static spike that could harm any connected equipment.

Are you certain a bass signal is making it into the sub? The complexities of modern AV receivers vary in how you configure them to direct LFE to a sub. Bone up on that end of the chain.

Or, just hang a CD player on the Inputs of the sub and play something with a reassonable amount of Low Frequencies.

>>>> Be advised that this way of testing has NO VOLUME CONTROL because amps without volume controls always operate at maximum gain, relying on your external controls to attentuate it (hence, the loud hum from a loose cable); so choose a track that eases into the loud parts with some quiet parts up front and BE READY TO PAUSE THE PROGRAM AT ANY SIGNS OF STRESS. <<<<

A living sub will produce only muffled rumble in the absence of other speakers producing the higher frequencies which carry the intelligence of the signal. If that works, back to the receiver for settings. If not... sigh.


For hum problems, even those you cause yourself:

Disconnect all inputs to see if that helps. If it goes away start with the signal cables and add in things until it comes back.

Sometimes the reversing the orientation of the AC plug can help with hum. Or it could be something like a loose or high resistance connection internal to the sub. Good luck.

Jun 17, 2008 | JBL PSW-D110 Speaker

1 Answer

Noise when it turns on

have you checked your music source? Some systems like computers have a sort of output first before normalizing, which isn't your powered subs or powered amps problem. Try plugging in a regular solid state player like an ipod if the humming is still there when automatically turning on or off...

Dec 06, 2007 | JBL PB12 Subwoofer

2 Answers

Sub-woofer does not turn itself on in 'Auto' mode (signal driven)

For the "auto on" problem.

These will sound very basic, please go with it.

On your signal source, make sure you have the sub set to on.
If you can adjust the output setting on your source, turn this up.
Adjust the volume setting on the sub lower to mach the volume of the main speakers.
You may need to make these adjustments a few times to get them working.

On the hum and noise problem

Check your power outlet for the sub, make sure the polarity is correct. I have found this to not always be right. Also what is on that same circuit. Things like the fridge can cause a lot of noise on the power line. Next check your connecting cables, are they of good quality? Are they running next to anything that may cause interference? Also check you connections to the signal source. Cable and dishes are known for ground problems.

Sep 26, 2007 | Velodyne CHT-12 Subwoofer

3 Answers

Jbl 12 subwoofer

Good chance it's the power supply; a capacitor there, the large one, may have gone. These things age and when they go, there's noisy power to the amp circuit and ... well, that may be what you're hearing. You should check your audio wiring, too. That woofer could be picking up a 60Hz hum from the AC mains and amplifying it. Maybe you can try another spkr on same cables and see if hum is in your woofer or elsewhere. Good luck.

Sep 10, 2007 | JBL PB10 Subwoofer

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 PSW-D112 Speaker Logo

741 people viewed this question

Ask a Question

Usually answered in minutes!

Top JBL Audio Players & Recorders Experts

Michael Edwards
Michael Edwards

Level 1 Expert

60 Answers


Level 3 Expert

5318 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a JBL Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides