Question strange noise coming from subwoofer

[thefinest1]

hi all

i wonder if you can help me troubleshoot my subwoofer. im getting a very strange noise coming from my subwoofer. I can't explain but I have recorded a video. SW is 5 years old

thanks

<iframe width="560" height="315" src="

View: https://www.youtube.com/embed/Qz-Sio2gsns
" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

 

[Dave_135]

What is this subwoofer hooked to, A TV set or a Computer?