Amazon.com: B&C Speakers RCK21SW1528 Voice Coil & Cone Complete Rebuild Kit for B & C 21SW152-8 Speaker 8 Ohms : Electronics
B&C 21SW152 is a very high power 21" subwoofer for speaker subwoofer systems- B&C 21SW152 21" Subwoofer has a lightweight neodymium magnet - B&C 21SW152 21" high power speaker for speaker subwoofer