Hello! I'm sure somebody will suggest I do a search for this, but I have and can't find what I'm looking for! (silly me) Does anyone know precisely what fix has been made on JBL PB12 subs? I hear there are a couple of capacitors that go bad, and cause odd noises. My sub turns on and off demonically. I wouldn't mind removing the auto on/off feature completely, or rigging it to operate with the 12v trigger from my Rcvr. simple enough once you know how, right? If I had a circuit diagram, I'm sure I could puzzle out how to hotrod the thing myself. If I get tired of looking for the answer, maybe I'll have to do some actual work and trace it out for us all! BTW - it sure is confusing to find "PB12" used for another sub -- one that is likely to be much better than the JBL!