when i increase the bass the subwoofer seems to fail and starts making this awful sound you can hear in the video.
Do you have an idea what could be the issue and is it repairable ?
Thanks a bunch!
That sounds like the sub amp going into oscillation.
You didn't give use any info on what subwoofer you have. Call the maker. Hope it's under warranty.
Would require a tech to repair which might cost more than it's worth.