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Continuous power handling
Voice coil diameter
Magnet material
This next evolution subwoofer uses a new, longer, four layer aluminum voice coil. The result is more energy in the gap, less heat, higher sensitivity, higher power handling, 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.
Features
- 3400 W continuous program power capacity
- 116 mm (4.5 in) four layer aluminum voice coil
- 30 - 1000 Hz response
- 99 dB sensitivity
- Double silicone spider with optimized compliance
- Ventilated voice coil gap for reduced power compression
- Aluminium demodulating ring for very low distortion
Specifications
- Nominal Diameter530 mm (21.0 in)
- Nominal Impedance8 Ω
- Minimum Impedance6.5 Ω
- Nominal Power Handling11700 W
- Continuous power handling23400 W
- Sensitivity (1W/1m)399.0 dB
- Frequency Range30 - 1000 Hz
- Voice Coil Diameter116 mm (4.5 in)
- Winding MaterialAluminium
- Former MaterialGlass Fibre
- Winding Depth36.0 mm (1.42 in)
- Magnetic Gap Depth14.0 mm (0.55 in)
- Flux Density0.8 T
Design
- Surround ShapeTriple Roll
- Cone ShapeRadial
- Magnet MaterialNeodymium Inside Slug
- SpiderDouble Silicone
- Pole DesignT-Pole
- Woofer Cone TreatmentTWP Waterproof Both Sides
- Recommended Enclosure130.0 dm3 (4.59 ft3)
- Recommended Tuning40 Hz
Parameters4
- Resonance Frequency30 Hz
- Re5.1 Ω
- Qes0.24
- Qms10.0
- Qts0.23
- Vas269.0 dm3 (9.5 ft3)
- Sd1680.0 cm2 (260.4 in2)
- η₀3.0 %
- Xmax± 15.0 mm
- Xvar± 16.5 mm
- Mms407.0 g
- Bl40.8 Txm
- Le4.6 mH
- EBP125 Hz
Mounting and Shipping Info
- Overall Diameter547 mm (21.54 in)
- Bolt Circle Diameter527 mm (20.7 in)
- Baffle Cutout Diameter508.0 mm (20.0 in)
- Depth255 mm (10.04 in)
- Flange and Gasket Thickness13 mm (0.51 in)
- Air Volume Occupied by Driver15.0 dm3 (0.53 ft3)
- Net Weight14.7 kg (32.41 lb)
- Shipping Units1
- Shipping Weight17.0 kg (37.48 lb)
- Shipping Box570x570x320 mm (22.44x22.44x12.60 in)
Service Kit
- Recone kitRCK21DS1158
Discover more
- 2 hours test made with continuous pink noise signal within the range Fs-10Fs. Power calculated on rated minumum impedance. Loudspeaker in free air.
- Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
- Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.
- Thiele-Small parameters are measured after a high level 20 Hz sine wave preconditioning test.