B&C 21SW115-4 21" Professional Neodymium Subwoofer 3400W 4 Ohm 4.5" voice coil
Key Features
3400 W continuous program power capacity
116 mm (4.5 in) split winding copper voice coil
33 - 1000 Hz response
97 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
Nominal Diameter 530 mm (21.0 in)
Nominal Impedance 4 Ohm
Minimum Impedance 4.2 Ohm
Nominal Power Handling 1700 W
Continuous Power Handling 3400 W
Sensitivity 97.0 dB
Frequency Range 33 - 1000 Hz
Voice Coil Diameter 116 mm (4.5 in)
Winding Material Copper
Former Material Glass Fibre
Winding Depth 34.0 mm (1.34 in)
Magnetic Gap Depth 14.0 mm (0.55 in)
Flux Density 1.15 T
Parameters
Resonance Frequency 33 Hz
Re 3.6
Qes 0.37
Qms 7.7
Qts 0.36
Vas 278.0 dm3 (9.7 ft3)
Sd 1680.0 cm2 (260.4 in2)
2.6 %
Xmax 14.0 mm
Xvar 15.0 mm
Mms 335.0 g
Bl 24.8 Txm
Le 1.7 mH
EBP 89 Hz
Mounting And Shipping Info
Overall Diameter 547 mm (21.5 in)
Bolt Circle Diameter 527 mm (20.7 in)
Baffle Cutout Diameter 503.0 mm (19.8 in)
Depth 249 mm (9.8 in)
Flange and Gasket Thickness 14 mm (0.53 in)
Air Volume Occupied by Driver 15.0 dm3 (0.53 ft3)
Net Weight 14.0 kg (30.8 lb)
Shipping Units 1
Shipping Weight 16.3 kg (35.94 lb)
Shipping Box 570x570x320 mm (22.44x22.44x12.60 in)
Service Kit
RCK21SW1154