B&C Speakers Woofer 12 NW 76 Specification

12NW76

Woofer

LF Drivers

LF Nd Drivers

Coaxials

HF Drivers

Horns

1000 W continuous program  power capacity

76 mm (3 in) copper voice coil

40 – 2000 Hz response

98.5 dB sensitivity

Neodymium ring magnet assembly

Aluminium demodulating ring allows a very low distortion figure

Ventilated voice coil gap for reduced power compression

Specification

Nominal Diameter

320 (12) mm (in)

Nominal Impedance (1)

8 Ohm

Minimum Impedence

6.9 Ohm

Nominal Power Handling (2)

500 W

Continuous  Power Handling (3)

1000 W

Sensitivity (1W/1m) (4)

98.5 dB

Frequency Range

40 -2000 Hz

Voice Coil Diameter

76 (3) mm (in)

Winding Material

Copper 

Former Material

Glass Fibre 

Winding Depth

19 (3/4) mm (in)

Magnetic Gap Depth

11 (7/16) mm (in)

Flux Density

1.3 T

Thiele & Small Parameters

Fs

40 Hz

Re

5.3 Ohm

Qes

0.17 

Qms

3.7 

Qts

0.16 

Vas

76 (2.7) dm3 (ft3)

Sd

522 (80.9) cm2 (in2)

Eta Zero

2.8 %

Xmax

+/- 8 mm

Xvar

+/- 10 mm

Mms

77 g

Bl

25.5 Txm

Le

1.25 mH

Mounting and Shipping Info

Overall Diameter

315 mm (12.4 in)

Bolt Circle Diameter

298 mm (11.7 in)

Baffle Cutout Diameter

283 mm (11.1 in)

Depth

147 mm (5.8 in)

Flange and Gasket Thickness

14 mm (0.55 in)

Net Weight

4.9 kg (10.8 lb)

Shipping Weight

5.6 kg (12.3 lb)

Shipping Box

340x340x170 mm

(13.4x13.4x6.7 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