- THE B&C 21DS115 IS AN VERY HIGH POWER 21" WOOFER THAT HANDLES 1,700 WATTS AES STANDARD & 3,400 WATTS PROGRAM
- NEWLY DESIGNED LONGER 4 LAYER ALUMINUM 4.5" SPLIT WINDING VOICE COIL THAT RESULTS IN MORE ENERGY IN THE GAP, HIGHER SPL & LOWER DISTORTION
- VERY HIGH EFFICIENCY OF 99DB SPL & SUPER HIGH 15.0MM XMAX
- THE HIGHEST BL FACTOR OF 40.8T-M OF ANY WOOFER WE CARRY FOR A STRONG TIGHT CHEST POUNDING INTENSE DEEP BASS SOUND
- NEODYMIUM MAGNET WEIGHS ONLY 32.63 LBS., ALUMINUM DEMODULATION RING & VENTILATED VOICE COIL GAP FOR LOWER POWER COMPRESSION
- B&C 21DS115 21" WOOFER IS OPTIMIZED FOR EXTREMELY HIGH OUTPUT SUBWOOFER SYSTEMS IN CONCERT, SOUND REINFORCEMENT SYSTEMS, THEATER, ETC.
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SPECIFICATIONS |
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Nominal Basket Diameter |
21" / 530mm |
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Impedance |
4 ohms |
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RMS Power Rating |
1,700 Watts |
| Program Power | 3,400 Watts |
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Frequency Response |
30Hz - 1.0kHz |
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Sensitivity (1W/1m) |
99dB |
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Voice Coil Diameter |
4.5" / 116mm |
| Winding Material | Aluminum |
| Former Material | Glass Fibre |
| Winding Depth | 1.42" / 36mm |
| Magnetic Gap Depth | .55" / 14mm |
| X Damage (peak to peak) | 60 mm |
| Flux Density | .8T |
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MOUNTING INFORMATION |
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| Overall Diameter | 21.54" / 547mm |
| Bolt Circle Diameter | 20.7" / 527mm |
| Baffle Cutout Diameter | 20" / 508mm |
| Depth | 10.04" / 255mm |
| Flange & Gasket Thickness | .51" / 13mm |
| No. Of Mounting Holes | 8 |
| Net Weight | 32.63 lbs./ 14.8 kg. |
| Shipping Weight | 37.92 lbs./ 17.2 kg. |
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MATERIALS |
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| Basket | Cast Aluminum |
| Cone | Paper |
| Cone Shape | Radial |
| Spider | Double Silicone |
| Surround Shape | Triple Roll |
| Pole Design | T-Pole |
| Demodulation Ring | Aluminum |
| Magnet | Neodymium |
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THIELE-SMALL PARAMETERS |
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Resonant Frequency (fs) |
30 Hz |
| Impedance (Re) | 5.1 ohms |
| Electrical Factor (Qes) | .24 |
| Mechanical Q (Qms) | 10.0 |
| Total Q (Qts) | .23 |
| Compliance Equiv. Vol. (Vas) | 269 Liters/9.5cu. ft. |
| Voice Coil Overhang (Xmax) | 15.0mm |
| Moving Mmass (Mms) | 407 Grams |
| Reference Efficiency | 3% |
| Surface Area of Cone | .1680 m2 |
| BL Factor | 40.8 T-M |
| Coil Inductance (Le) | 4.6mH |
| FREQUENCY RESPONSE | |