ive blown 2 id max's, decided to screw dealing with their subs, my blown one is sitting at idmax headquarters and they are wanting 160 to fix it for the 2nd time ive already spent 350 on the sub and figured why keep wasting my money and got a different sub...make SURE that your gains set correctly and that you do not have bass boost on...also make sure you are not over powering it, when i did this the surround rubber made a bend or crimp when it reached max excursion and made a poping noise as well, that might be it...these subs are extra sensitive if u dont take it easy it will blow atleast 2 times easier!!