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B&C 21DS115 - 21" 1700W 8 Ohm Loudspeaker
This next evolution subwoofer uses a new, longer, four layer aluminum voice coil. The result is more energy in the gap, higher sensitivity, lower distortion and better overall performance. The 21DS115 features a 36 mm long, 4.5 inch diameter (116mm) Copper Clad Aluminum Wire voice coil. With a 1700watt AES power rating, 99 dB sensitivity, and over 16.5mm of Xvar, this high energy subwoofer is a significant step forward from similar models in the B&C range, even approaching the performance of our 6” voice coil alternatives.
- 3400 W continuous program power capacity
- 116 mm (4.5 in) four layer aluminum voice coil
- 30 - 1000 Hz response
- 99 dB sensitivity
- 60 mm peak-to-peak excursion before damage
- Neodymium magnet allows a very high force factor and linear excursion
- Double silicone spider with optimized compliance
- Ventilated voice coil gap for reduced power compression
- Aluminium demodulating ring for very low distortion
Specifications:
Design:
Parameters:
Mounting And Shipping Info:
- Nominal diameter 530 mm (21.0 in)
- Nominal impedance 8 ohms
- Minimum impedance 6.5 ohms
- Nominal power handling 1700 W
- Continuous power handling 3400 W
- Sensitivity (1W/1m) 99.0 dB
- Frequency range 30 - 1000 Hz
- Voice coil diameter 116 mm (4.5 in)
- Winding material Aluminium
- Former material Glass Fibre
- Winding depth 36 mm (1.42 in)
- Magnetic gap depth 14 mm (0.55 in)
- Flux density 0.8 T
Design:
- Surround shape Triple Roll
- Cone shape Radial
- Magnet material Neodymium Inside Slug
- Spider Double Silicone
- Pole design T-Pole
- Woofer cone treatment TWP Waterproof Both Sides
- Recommended enclosure 130.0 dm3 (4.59 ft3)
- Recommended tuning 40 Hz
Parameters:
- Resonance 30 Hz
- Re 5.1 ohms
- Qes 0.24
- Qms 10.0
- Qts 0.23
- Vas 269.0 dm3 (9.5 ft3)
- Sd 1680.0 cm2 (260.4 in2)
- Reference efficiency 3.0 %
- Xmax 15.0 mm
- Xvar 16.5 mm
- Mms 407 g
- Bl 40.8 Txm
- Le 4.6 mH
- EBP 125 Hz
Mounting And Shipping Info:
- Overall diameter 547 mm (21.54 in)
- Bolt circle diameter 527 mm (20.7 in)
- Baffle cutout diameter 508.0 mm (20.0 in)
- Depth 255 mm (10.04 in)
- Flange and gasket thickness 13 mm (0.51 in)
- Air volume occupied by driver 15.0 dm3 (0.53 ft3)
- Net weight 14.8 kg (32.63 lb)
- Shipping weight 17.2 kg (37.92 lb)
- Shipping box 590x590x300 mm (23.1x23.1x11.8 in)
- Recone Kit RCK21DS1158
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