B&C 21SW115-4 21" Professional Neodymium Subwoofer 3400W 4 Ohm 4.5" voice coil
Key Features
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3400 W continuous program power capacity
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116 mm (4.5 in) split winding copper voice coil
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33 - 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
Specifications
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Nominal Diameter 530 mm (21.0 in)
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Nominal Impedance 4 Ohm
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Minimum Impedance 4.2 Ohm
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Nominal Power Handling 1700 W
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Continuous Power Handling 3400 W
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Sensitivity 97.0 dB
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Frequency Range 33 - 1000 Hz
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Voice Coil Diameter 116 mm (4.5 in)
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Winding Material Copper
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Former Material Glass Fibre
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Winding Depth 34.0 mm (1.34 in)
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Magnetic Gap Depth 14.0 mm (0.55 in)
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Flux Density 1.15 T
Parameters
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Resonance Frequency 33 Hz
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Re 3.6
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Qes 0.37
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Qms 7.7
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Qts 0.36
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Vas 278.0 dm3 (9.7 ft3)
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Sd 1680.0 cm2 (260.4 in2)
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2.6 %
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Xmax 14.0 mm
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Xvar 15.0 mm
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Mms 335.0 g
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Bl 24.8 Txm
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Le 1.7 mH
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EBP 89 Hz
Mounting And Shipping Info
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Overall Diameter 547 mm (21.5 in)
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Bolt Circle Diameter 527 mm (20.7 in)
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Baffle Cutout Diameter 503.0 mm (19.8 in)
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Depth 249 mm (9.8 in)
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Flange and Gasket Thickness 14 mm (0.53 in)
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Air Volume Occupied by Driver 15.0 dm3 (0.53 ft3)
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Net Weight 14.0 kg (30.8 lb)
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Shipping Units 1
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Shipping Weight 16.3 kg (35.94 lb)
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Shipping Box 570x570x320 mm (22.44x22.44x12.60 in)
Service Kit
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RCK21SW1154
