High Order Quarterwave Society (DIY Paraflex development community) | A sneak peak at Ricky Tipper's giant sized 25hz tuned Paraflex cabinets for the B&C 21DS115 driver .....72" x 24" x 36"... | Facebook
4-18 cubic ft. flared slot ported build using 4-B&C 21DS115-4 Drivers | AVS Forum
B&C 21DS115 in action - YouTube
B And C 21DS115 B&c Speakers 4.5"coil,21"woofer - Walmart.com
Outdo B&C 21DS115 and upgrade to modular subs - Speakerplans.com Forums - Page 6