B&C 21SW152-4 21" Neo Subwoofer
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4000 W continuous program power capacity
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153 mm (6 in) split winding copper voice coil
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30 – 1000 Hz response
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97 dB sensitivity
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60 mm peak-to-peak excursion before damage
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Neodymium magnet allows a very high force factor and linear excursion
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Double silicone spider with optimized compliance
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Ventilated voice coil gap for reduced power compression
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Aluminium demodulating ring for very low distortion
Specification
Nominal Diameter 530 mm (21 in)
Nominal Impedance 4 ohm
Minimum Impedance 4.3 ohm
Nominal Power Handling
(AES)
2000 W
Continuous Power
Handling
4000 W
Sensitivity (1W/1m) 97 dB
Frequency Range 30 - 1000 Hz
Voice Coil Diameter 153 mm (6 in)
Winding Material Copper
Former Material Glass Fibre
Magnet Material Neodymium Ring
Winding Depth 30 mm (1.18 in)
Magnetic Gap Depth 12 mm (0.5 in)
Flux Density 1.2 T
Thiele & Small Parameters
Fs 30 Hz
Re 3.3 ohm
Qes 0.28
Parameters
Qms 6.6
Qts 0.27
Vas 273 dm3 (9.5 ft3)
Sd 1680 cm2 (260.4 in2)
EtaZero 2.5 %
Xmax ± 15 mm
Xvar ± 16 mm
Mms 428 g
Bl 31 Txm
Le 2 mH
Mounting and Shipping Info
Overall Diameter 547 mm (21.5 in)
Bolt Circle Diameter 527 mm (20.7 in)
Baffle Cutout Diameter 508 mm (20 in)
Depth 261 mm (8.2 in)
Flange and Gasket Thickness .63mm
Net Weight 40.7 lb (18.5kg)
Shipping Weight 60 lb
Shipping Box 590x590x300 mm (23.2x23.2x11.8 in)
For different impedances, please ask.
22 hours test made with continuous pink noise signal (6 dB crest factor).
Power calculated on rated minimum impedance.
Power on Continuous Program is defined as 3 dB greater than the
Nominal rating.
Applied RMS Voltage is set to 2.83V for 8 ohms or 2.0V for 4 ohms
Nominal Impedance
