wheres the dustcap?Based on how loud it was on the video, it doesn't really sound like tinsel slap.
The dustcap could be loose or maybe one of the spiders came unglued @ the former. I say try playing it free air and see if you can tell where its coming from.
Had the same sound as well when the coil unwound from my sub as well.yea i was gonna say never open the trunk when your banging, but that sounds like my sub when the coil came unwound for sure.