kicker l7 is a great line however .... i have a friend who yanked out his and went up with comp vr's he took 2nd place at the idbl world finals.
now if your in comps you need to bring spares with you. when i went to a double point event in michigan there was a guy who had 2 of them ... then he blew one. ouch! the biggest problem the store didnt sell them if he had round subs he could have put anything in there ... but he had squares so he was out of luck. the new l7 is even better