2) B&C 21SW152-4 21" Neodymium Subwoofer 4-Ohm DJ Live Sound 4000Watts Bass Sub
B&C R21SW152 Recone Kit for 21SW152
B&C Speaker 21SW152 - 21" Subwoofer
AERONS SUB821 !! 3600w Subwoofer with 21SW152 - YouTube
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