Test Bench: B&C Speakers 21DS115 21-Inch Woofer | audioXpress
The Periscope Subwoofer B&C 21DS115 | Page 9 | AVS Forum
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
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