JBL SCS125A System "subwoofer constantly thumping" Questions

...subwoofer is at leat 4 bad components degraded due to heat. Remove the module and ship to Mr. Transistor 453 Opelika Rd. Auburn, Al 36830. If your sub is thumping and not staying on at lower levels I ...

subwoofer "thumping" w. no audio feed My sub is making a "heartbeat" noise even with no audio feed. It is plugged in to a surge protector (I tried two different strips that are working with other ...

...Subwoofer has constant machine gun "thumping" connected to system or not. Serial number begins with "AM0035" and was told these amps cannot be repaired.Is this true? What now? PB-10/12 using bad ...

bose acousticmass 15 sub-woofer making a noise Recently my house experienced an electrical surge during a thunderstorm. The sub-woofer powers on, but just makes a constant thumping noise. I replaced ...

I have the accoustimas 15 surround sound. Even when not in use the subwoofer emits a constant thump. It's very low but irritating. What is causing this? That would be an electrical fault. Possibly an ...