Recone kit B&C Speakers 21DS115, 4 ohm, glue not included
21DS115 LF Drivers - B&C Speakers
B&C 21DS115-8 21" Neodymium Subwoofer 3400 Watts Program 4.5" Coil 8-Ohm Pro Sub | eBay
B&C 21DS115-4 21" Professional Neodymium Subwoofer 4 Ohm – lopez variety sound System
Test Bench: B&C Speakers 21DS115 21-Inch Woofer | audioXpress
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
Test Bench: B&C Speakers 21DS115 21-Inch Woofer | audioXpress
Speaker B&C Speakers 21DS115, 4 ohm, 21 inch
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 21" Professional Neodymium Subwoofer 8 Ohm | eBay