B&C 21DS115 is a very high power 21" subwoofer for speaker subwoofer systems- B&C 21DS115 21" Subwoofer has a lightweight neodymium magnet - B&C 21DS115 21" high power speaker for speaker subwoofer
21DS115 LF Drivers - B&C Speakers
Outdo B&C 21DS115 and upgrade to modular subs - Speakerplans.com Forums - Page 5
B&C 21DS115-8 21" Neodymium Subwoofer 3400 Watts Program 4.5" Coil 8-Ohm Pro Sub 848864050614 | eBay
Stormbreaker a B&C 21DS115 Subwoofer Solution | AVS Forum