Mordent Short Genie - Subwoofer making noises by itself

CptJackel

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Mordent Short Genie - Subwoofer making noises by itself
Hi,

I have a mordent short genie 5.1 speaker system, no problems for 9-10 years. But in the last 2-3 weeks the subwoofer will randomly make thump noises by itself. this is not the groundlooping HUM I have read about. This is something else. I can go days with no issues, then 5 minutes of thumping.. then nothing for an hour. so it seems random. day or night this happens.

things I have tried and the sound still happens.
  • Unplugging audio cables
  • Turning off pretty much everything else in the house, wifi, cooker, etc etc
  • Plugging into a surge extension.
  • different plug
  • different socket (several around the house)

in a last attempt, I brought a new SUB. Plugged into socket in kitchen with no Audio and the subwoofer started making noise. again NOTHING plugged in other that the power!

what could this be. its not my SUB, its not my AMP, its something in the power? or something else?

your help is appreciated as its driving me mad.
 
Hej! Pls see my posting today March 2, 2022. Exactly the same issues as I have, same attempts to solve it, including a new sub! (also making noise). It now looks like a generic design problem…
 
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