B&C Speakers 21SW150 Specification

21SW150

Subwoofer

LF Drivers

LF Nd Drivers

Coaxials

HF Drivers

Horns

3000 W continuous program  power capacity

150 mm (6 in) copper voice coil

30 – 1000 Hz response

95 dB sensitivity

Ventilated voice coil and aluminium demodulating ring 

60 mm peak-to-peak excursion before damage

Double silicone spider with optimized compliance

Specification

Nominal Diameter

530 (21) mm (in)

Nominal Impedance (1)

4 Ohm

Minimum Impedence

4 Ohm

Nominal Power Handling (2)

1500 W

Continuous  Power Handling (3)

3000 W

Sensitivity (1W/1m) (4)

95 dB

Frequency Range

30 - 1000 Hz

Voice Coil Diameter

150 (6) mm (in)

Winding Material

Copper 

Former Material

Glass Fibre 

Winding Depth

30 (1.18) mm (in)

Magnetic Gap Depth

12 (1/2) mm (in)

Flux Density

1.2 T

Thiele & Small Parameters

Fs

29 Hz

Re

3.3 Ohm

Qes

0.27 

Qms

8.1 

Qts

0.26 

Vas

254 (8.9) dm3 (ft3)

Sd

1680 (260.4) cm2 (in2)

Eta Zero

2 %

Xmax

+/- 15 mm

Xvar

+/- 16 mm

Mms

494 g

Bl

32.6 Txm

Le

1.3 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

250 mm (8.2 in)

Flange and Gasket Thickness

15.5 mm (5/8 in)

Net Weight

18 kg (40 lb)

Shipping Weight

20.4 kg (44.9 lb)

Shipping Box

590x590x300 mm

(23.2x23.2x11.8 in)

1

For different impedances, please ask.

2

2 hours test made with continuous pink noise signal (6 dB crest factor).

Power calculated on  rated minimum impedance. 

3

Power on Continuous Program is defined as 3 dB greater than the

Nominal rating.

4

Applied RMS Voltage is set to 2.83V for 8 ohms or 2.0V for 4 ohms

Nominal Impedance