Question about JBL PB12 Subwoofer

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I need a module

I need to replace a module for my PB12 the part number is S64AM1. Where can I find one?

Posted by zacbonnie on


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I have the same subwoofer, my amp crapped out as well. I am going to take out the JBL amp and replace it with a dayton sa240. They are not close in measurement but I'm going to seal the old amp hole with mdf and cut another hole for the new amp.

Posted on Jan 12, 2009


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Jbl pb12 popping green light on off

Perhaps it could be the capacitor as mentioned above - but it could be any number of other issues - if that don't fix it - send it to us - Edwards Electronics - Ebay - Check Auction - Thanks

Nov 06, 2011 | JBL PB12 Subwoofer

1 Answer

I have a JBL PB12 it works for a few minutes then it shuts off and on and the lights on the front flash red, green, red, green..... why is this? Is it something I can fix or get fixed? I don't realy have...

Here are the service manuals, you may what to read the service bulletin section. Most common failure in the PB10/12 is the blown ClassD amp module which you cannot get it anymore. This is how I fixed my:

Mar 08, 2010 | JBL PB12 Subwoofer

1 Answer

I blew the circuit board on my jbl pb12 subwoofer. how or where do i find a replacement and is it expensive or a cheap part to fix/replace?

Sorry to hear that. The JBL PB12 are notorious for their amplifier module giving out. This item is not repairable nor is there a replacement (The module is potted into an aluminum heat sink). Actually, I need to clarify, as the late models used discrete components. If this is the case, either Repair it yourself (Google search PB12 Repairs) or take it to the local repair shop. (Or to a technical college with an electronics program, they may work on it!)

The best method is looking for a plate amp to replace the PB12 Amplifier - try the bash 300W. Several people have done this conversion. Be warned, you will need to do woodworking if you want to mount the plate amp on the box!

Mar 01, 2010 | JBL PB12 Subwoofer

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HOW TO REPAIR A DAMAGED JBL PB12 it just stopped working, somebody told me it was unfixable due the part are very hard to get I guess the internal amplifier got broken

There is a quick way to find out if the parts are hard to get. Look inside a make a note of the IC and Transistor numbers. Don't bother with the resistors and caps. Put the numbers into Google and see what comes up.

Feb 08, 2010 | JBL PB12 Subwoofer

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