JBL E150P Subwoofer Amp - diyAudio
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Old 12th May 2014, 04:04 PM   #1
M3G4 is offline M3G4  United Kingdom
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Join Date: Jul 2006
Default JBL E150P Subwoofer Amp

Hi guys,

Kinda at a loss with my subwoofer at the moment, I need advice from those in the know! I've tried visual checks but I don't think anything has physically popped...

Anyway, I've got a JBL E150P subwoofer that on the whole behaves properly - turns on and plays bass notes through line level when requested but it's gained a couple of new quirks that I'd like to fix before they degrade into full-on faults.

The problems I'm having seem to be with the Amp powering down after auto sensing. When it powers off, it does so with a loud thud, and also it powers off incredibly quickly after the signal has gone. It used to leave around 5 minutes before powering off so as to not cut off during quiet parts, but now it powers down almost instantaneously after sub tracks have gone quiet.

I've got service manuals (here) I can post and also can take various pictures. What I was wondering is if anyone knew what could be the culprit? I'm quite happy to order in parts and re-solder as long as I've got a working sub at the end
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