B&C - 12-NDL 76 Woofer Hoparlör

Nominal diameter 320 mm (12.0 in)
Nominal impedance 8 Ω
Minimum impedance 6.2 Ω
Nominal power handling * 400 W
Continuous power handling * 800 W
Sensitivity (1W/1m) * 100.0 dB
Frequency range 50 - 2000 Hz
Voice coil diameter 76 mm (3.0 in)
Winding material Aluminium
Former material Glass Fibre
Winding depth 19 mm (0.75 in)
Magnetic gap depth 10 mm (0.4 in)
Flux density 1.25 T
Design
Surround shape Double Roll
Cone shape Exponential
Magnet material Neodymium Inside Slug
Spider Single
Pole design Straight Pole
Woofer cone treatment WP Waterproof Front Side
Recommended enclosure 42.0 dm3 (1.48 ft3)
Recommended tuning 65 Hz
Parameters *
Fs 50 Hz
Re 5.3 Ω
Qes 0.21
Qms 4.2
Qts 0.2
Vas 73.0 dm3 (2.5 ft3)
Sd 522.0 cm2 (80.9 in2)
η₀ 4.3 %
Xmax 6.5 mm
Xvar 6.5 mm
Mms 53 g
Bl 20.1 Txm
Le 1.0 mH
EBP 238 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 141 mm (5.5 in)
Flange and gasket thickness 14 mm (0.55 in)
Air volume occupied by driver 2.5 dm3 (0.08 ft3)
Net weight 3.9 kg (8.6 lb)
Shipping units 1
Shipping weight 4.5 kg (9.9 lb)
Shipping box 340x340x170 mm (13.4x13.4x6.7 in)