My friend's ACI Titan subwoofer started going crazy in middle of night. A loud pulsating noise.
It is probably 15-20 years old.
Here is video of it. This with no music playing- just powered on and connected to a Jolida integrated amp variable output. Has worked great for years.
Not static or popping on amp. The monitors (ACI Sapphires) sound great.
https://photos.app.goo.gl/mkqUB28r2yPx3yqA9I checked cable, reinserted cable, swapped cable, checked inputs, etc.
The speaker itself looks great- but maybe I am missing something obvious.
Any help on this appreciated as to next steps.
Is there a drop in replacement?
Is there an obvious part that is failing?
Is it worth trying to fix?
THANKS!