I was looking at a thread on here, and seen someone fix a vc plug and dustcap, saying it was causing noise beneath the dustcap. I'm having similar symptoms with my sub, sounds like something beneath it is loose, and makes a popping sound. Low frequencies really make it move and make noise, and higher frequencies it almost seems to dissipate. If anyone could help me, I would appreciate it, I don't think this is good for the sub.
