If your car stereo sounds bad, look at the speakers first
Understanding Subwoofer Performance and Preventing Damage
Kicker Car Subwoofer w/Enclosure 10 inches : Speaker is broken $30 firm for Sale in Irvine, CA - OfferUp
How to fix a Blown Subwoofer?
Repair Blown Subwoofer!!! (Spider Separated From Cone) - YouTube
Subwoofer looks great but makes a really crazy sound that sounds like a rattle kinda that's not meant to be there seems to be coming from the magnet . Is it blown :