B&C 12NW76 - 4 Ohm

Specifications
 

• Nominal diameter 320 mm (12.0 in)
• Nominal impedance 4 ohms
• Nominal power handling 500 W
• Continuous power handling 1000 W
• Sensitivity (1W/1m) 99.0 dB
• Frequency range 40 - 2000 Hz
• Voice coil diameter 76 mm (3.0 in)
• Winding material Copper
• Former material Glass Fibre
• Winding depth 19 mm (0.75 in)
• Magnetic gap depth 11 mm (0.43 in)
• Flux density 1.3 T 
   

Design

• Surround shape Triple Roll
• Cone shape Exponential
• Magnet material Neodymium Ring
• Spider Single
• Pole design T-Pole
• Woofer cone treatment WP Waterproof Front Side
• Recommended enclosure 50.0 dm3 (1.77 ft3)
• Recommended tuning 60 Hz 
   

Parameters

• Fs 40 Hz
• Qes 0.17
• Qms 3.7
• Qts 0.16
• Vas 76.0 dm3 (2.7 ft3)
• Sd 522.0 cm2 (80.9 in2)
• Reference efficiency 2.8 %
• Xmax 8.0 mm
• Xvar 10.0 mm
• Mms 77 g
• Bl 25.5 Txm
• Le 1.25 mH
• EBP 235 Hz

Mounting and Shipping Info
 

• Overall diameter 315 mm (12.4 in)
• Bolt circle diameter 298 mm (11.7 in)
• Baffle cutout diameter 283.0 mm (11.1 in)
• Depth 147 mm (5.8 in)
• Flange and gasket thickness 14 mm (0.55 in)
• Air volume occupied by driver 2.5 dm3 (0.08 ft3)
• 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)