Thumping when not hooked up

ur rca wires or its the holder itself if the subs do it when the rca wirtes are off the oits the bord inside the amp

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.

Because even though your stereo is turned down the gain for the sub is set all the way up so it will still gain a small amount of signal. it is a flaw with some of the newer aftermarket stereos. try turning the nob until the thump stops then change the bass setting on your deck to compensate for the bass loss.

you need an noise filter in line. It's been a few years since I've had a system but I had the same problem. High power amps like the one you have can actually pick up on the electric pulses from your ignition system. I think I got mine at walmart, or auto zone, somewhere like that. Their pretty cheap too. I don't remember how its hooked up, but If you know how to hook and amp up, this should be no problem.

It sounds like you need to ask for pro help mate, mybe the amp just needs setting properly, Is the amp on bypass for bass, or does the amp run the complete system

Hello there..Thats normal only if your sub volume and the pre amp is turned up..Your amp is the cause of the speaker jump..Turn amp volume sub level down a few and check your wire from sub to amp..If all of that is good is a normal operation for pre amp warm up in sub if level is turn to max..Try unplugging amp freom sub then turn sub on stand alone(just sub outlet plugged in and no wires from base amp plugged in..If sub stops the its the amp making the problem..If it still is there then the pre amp is either dusty on inside or the outlet plug that it is plugged in doesnt have a good ground..Hope these help to solve your problem..Have a great day...

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thoght i coukd...

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 :)

did you ever get this problem fixed? i have the problem with my 128mb thumps. please respond

Ok.... FIRST COMMON PROBLEM: recheck your ground connection. Make sure that your amps ground wire is securely bolted to the metal body of your car. Not only that- yo uhave to scrape or use sandpapar to make sure that the terminal is touching bare metal.. this is a very common problem. Nobody realizes that the ground connection is just as impoarant as the power connection... Next unplug youir rca cables from the amp. If the heartbeating goes away then mabye you have a rca cable or deck issue. If you can wiggle the rcas at the amp and make it heartbeat more or less.. then perhaps the rca terminals have come unsoldered form the circuit board... in any case without me looking at it personally this is about all i can tell you. CHeck your connections and GOOD LUCK!!!!!