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). The audio feed is unplugged and it makes a thump-thump on a regular interval. Any idea? Blown fuse?
You need to check your ground connection. If there is a bad ground there will be feedback to the amp and it will just sit there and loop back with the Thump, Thump, Thump sound. I had to wire my amp's ground all the way back to the negative battery terminal. It was a pain but I have never had a problem since :)
I have Bose sound bar that is thump thump thump it's really annoying any one know why
I've checked all connections
I'm running it through the aux to headphone jack
As the optical cable won't give any decent volume
I'm having the exact same issue after several months of use... Every time I turn on my sub, there is a loud Thump, Thump, Thump, Thump which stays at a constant volume, regardless of the volume knob level in the back. Sounds exactly like someone tapping on a loud microphone in perfect timing. I disconnected my audio signal cable completely from the sub and it does it as well... tried different electrical outlets, and different switch positions on the back... auto or not, it still makes the "heartbeat" sound. It does this for about 10 seconds and then goes silent... when everything is connected to the receiver, it will play perfectly for a while and then at random times will break back into the Thump, Thump, Thump.... It drives me crazy... any solutions? Looks like a quality issue.
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Looks like the capacitors on the amp are going.
If you hear a hummm sound when you turn it on without anything playing on it, then the capacitors are to blame for sure -> Time to replace the capacitors.
It is not latching on to the soundbar transmitter. Is the locked light on the device turning on. Wireless devices are sometimes known to drift. Is the sub silent when the soundbar power is off ?. Even then if its making this sound, the subwoofer amplifier is oscillating at very low frequency. You will need professional help and needs to be repaired.
larryagross, Sounds like you blew the speaker! The amp is sensing the voice coil is connecting to the speakers magnet or iron core and is going into a safe mode. It is possible to blow the coil even when the sub has a built in amp.
First make sure that you have the gains properly set ans not all set to their maximums. Second, disconnect signal to the sub then unplug the power for a few minutes. Third, plug the sub into a source of power on a different circuit using a surge protector.
Does the speaker make any popping at the time it powers up? If so you have a amp problem. If there is no sound produced, connect it back the the system using a different signal cable. Does the speaker now pop again when sound is produced. If so the speaker has failed. Contact a Velodyne repair facility.
My Onkyo S/W did the same thing untill I unplugged it from the surge protector that all the other A/V devices are plugged into. I plugged the sub into it's very own wall recepticle with it's very own new surge protector. Maybe cleaner power is the answer.
Hiya, I am guessing that the fried wires were the inputs to the speakers? If thats the case and they are damaged, then unfortunately both JBL could be blown, most likely preamp damage. Try taking them away from the system and using a completely different source like the output from a CD player/MD/ even video with a new cable. That will tell you if it is the speakers or the reciever you are using.
If they are damaged, you will need someone with electronics abilty to repair. If the input wires are damaged, there is a good chance there will no warranty, however discuss with JBL, then decide where they go for repair.
Try hooking up a different signal input to your powered sub, another
stereo or even a dvd players audio output to the sub will work for a
test. Just make sure the subs gain is down before starting. If it
still not producing sound, the subwoofers amplifier is bad. I hope this
First thing to check are signal cables but broken fuse telling me that problem is 99% in sub power supply unit or the amp.If you have a voltmeter and if you KNOW how to do it dissasembly it and check DC voltage on a speaker conntacts.If there is any DC present your amp is worn out.But this can be VERY DANGER because 220/110V is there so if you are not 100%sure that you can do it DON'T!!!
Sounds like a ground loop issue. Try plugging your sub, and the rest of your entertainment equipment into the same outlet with an extension strip (4 plug adaptor). If there is too much stuff to plug into one strip, experiment with combinations and hopefully you will find which piece of gear is the culprit.