I been having a bad noise out of one of my subs so today I took time to take it out to see what was goin on, I looked at everything you can see when I looked down to hole you can see where the former is connected to the cone and the former is cracked and shifted don't know how far down but my question is, how does this happen? Over pushing them or factory default? Just wondering either way it trash now, nothing but problems with alpine time to go with a quality subs now. Thank you for input.