OK so here's my situation:Just put in a new headunit (see the Sony CDX-F605x Review thread) and it has a separate sub control volume. I only turned it all the way up 1 time and made sure not to turn the main volume very high, just kinda testing things out you know? well that was about a week and a half ago, and today i went to vaccum out my car and the sub was makin funny noises. I popped the trunk and WTF?!?!?!? the foam is torn for about 3-4" around the cone. My amp is only 220 watts cuz i didnt want HUGE boom but because the way my last headunit was, i had the gain all the way up? My sub was a 10" JL Audio W0. The sub is a lil old and it was only a $30 investment off a friend. What do i need to know so i dont do this again when i get my new sub