The SXPW860 powered subwoofer has a side mounted 8" black polypropylene woofer with butyl rubber surround. The port vents toward the front. I was made in Canada.
SOURCE: jbl PB12 powered sub woofer problem
These subs have had many problems, all associated with the amplifier section. PB 12's with an "M" as part of the ser. no. were assembled in Mexico and these are the ones with the amp problems. JBL fixed mine and sent it back no charge, BUT it cost me nearly $100 to send it to them in the first place. I have another one that has had no problems at all. Try sending it back for repair. At best you'll get a rebuilt unit back, at worst a substantial discount from the company for a new sub.
SOURCE: sound problems through subwoofer
check all speakers wires andcheck test mode. every thing ok, may be input wiring problem ,check every thing after that internalcircuit may be problem..
SOURCE: jbl PB12 powered sub woofer
if your serial number starts with ha then it's probably a bad capacitor C72 . 6.8uf 100v np electrolytic. replace it with a higher voltage capacitor of the same value.
SOURCE: Can I replace the sub woofer in my home stereo
if the impedance of the new speaker matches the impedance of the old one then i dont see why it wont work
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