JBL SCS125A System "speakers making thumping sound power" Questions

thumping noise without input from receiver I had the system shut off fow a while and plugged it back in and turned power off. even without the lead from the amp the speaker thumps randomly So no wires

...thumping/chirping noise when turned on. Its not even connected to the receiver Since you have said the speakers make this sound when "turned on", I'm going to assume there's some form of power ...

...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 components). ...

speakers as soon as the amp turned off. That way, you would never hear the thump. But relays, as we've already seen, aren't great for real high fidelity sound quality. If we used them, you would never

...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 the fuse, but it makes the same ...

...power amp circuit is shutting down a few seconds after startup. Might check to make sure no speakers or cables have shorts, which could activate a protection shutdown circuit. If any of the cubes ...

...thumping sound like a heartbeat. i have tried moving it, switching frequency channels, different outlets with no joy. It is not latching on to the soundbar transmitter. Is the locked light on the ...

...thumping or clicking sound. This indicates that the speaker may still be working. If you don't have a multimeter try a 1.5 volt battery (say a AA), DONT USE HIGHER VOLTAGE BATTERIES they may damage ...

...thumping sound. The machine gun "fire" starts only 2 or 3 seconds after I switch on the sub. It does this even if I disconnect the input line-in jack. I opened the sub but could not see any signs of ...

thumping it was making is gone and the sub is working great again. (Yes it was doing so even without any inputs). While de-soldering make sure don't apply too much heat. The boards are pretty weak and