Tinsel leads slapping against the cone can do that too. Impossible to say what it is from a video.Quote:
Originally Posted by stormwind13 /t/1466712/is-this-subwoofer-damaged-or-normal-noise-video#post_23164102
given the inconsistent noise pattern, it's probably the voicecoil broken up down inside the motor structure. Possibly the former came unglued from the cone too.