PinWoofer JJP Backbox Static / Noise Detection and Possible Fix

If you have noise present in your JJP PinWoofer System and have exhausted other options to eliminate it, the below suggestion may be a means to fix your issue.

While some music is playing, un-plug the 2-pin Molex connector from the expander board as shown below and follow the below 3 steps:

1) There will be an immediate reduction in bass - this is expected.

2) Listen for an reduction in or elimination of the unwanted noise.  (If this helps, you are likely on the way to fixing your issue!)

3) Re-plug the 2-pin Molex connector.

ONLY if 2) above yields a reduction / elimination in noise, perform the below:

1) Remove the factory calibration tape as shown.

2) Adjust each trim pot as shown.

CAUTION: The trim pots are meant for minimal use; over-exercising these trim pots will quickly wear them out.  Do not rotate pots more than a few times or else you'll damage them and the expander board will require repair.