Question about Jensen JPS12 Subwoofer

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Jensen jps12 powered subwoofer

I need a schematic, the unit emits a flatulent sound whenever it's auto-shutdown circuit detects no or low sound. Jensen won't help, they are aware of the problem but offer no assistance.

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SOURCE: someone replaced the subwoofer on a jensen jps12


Posted on Aug 08, 2009

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I have the accoustimas 15 surround sound. Even when not in use the subwoofer emits a constant thump. It's very low but irritating. What is causing this?

That would be an electrical fault. Possibly an Electrolytic Capacitor that is leaking voltage into the audio circuit. Or a faulty semi-conductor.

Aug 25, 2015 | Speakers & Subwoofers

1 Answer

Wiring diagram for jp12 subwoofer

your sub woofer has only one input to make it work. plug in your rca cables into the back of the sub woofer and the other end into the audio out or subwoofer out put on the back of your surround system.
also has 2 speaker inputs so you can expand your speaker setup. plug thos in and you can hook up 2 speakers to th output on the back of the sub.

Jan 29, 2011 | Jensen JPS12 Subwoofer

1 Answer

Jensen JPS12 growls at random...

Get rid of it and get a real sub!

Sep 27, 2009 | Jensen JPS12 Subwoofer

1 Answer

15 inch velodyne subwoofer making a loud popping sound

If you have changed the signal source, then these may not be the problem at all, it may be that you have the sub output set to low on your processor.

This may be one of these problems.

It could be the "auto on" circuit.
If you change the switch on the back of the unit to always on does it still do this? if not then it is the auto on circuit that is the problem.

The driver mounted servo unit is starting to fail.

A cap in the amplifier input section may be going bad.

You nwill need to contact Velodyne for repair of the unit.

Feb 20, 2009 | Velodyne HGS-15 Subwoofer

2 Answers

Sony Active Subwoofer noise

The circuit that should be turning the sub on and off based upon the presence of an audio signal is not working correctly and the sub is trying to reproduce 60 cycle hum. The unit needs service.

Mar 09, 2008 | Speakers & Subwoofers

6 Answers

KLH ASW10-120B subwoofer

I realize that this is an old problem, but folks are still finding it on searches, so here goes.

Here are the two pages of schematics from KLH. I wrote to their tech department and explicitly asked for permission to share them here.

Here's the lower board, which has the power supply:
KLH ASW 10-120 subwoofer schematic - lower board

Here's the upper board:

KLH ASW 10-120 subwoofer schematic - upper board

Jan 25, 2008 | KLH ASW10-120 Subwoofer

2 Answers

Farting Noise

Do a more detailed search there is a solution but you will have to send it out to get repaired the noise is from when it goes on stand by...jensen is of no help

Aug 27, 2007 | Jensen JPS10 Subwoofer

1 Answer

Jensen Subwoofer JPS-10

This sound is made by the automatic shutdown in the speaker. Jensen repaired my unit under warrantee.

Aug 27, 2007 | Jensen JPS10 Subwoofer

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