B&C Speakers Woofer 8NDL51 User manual

8NDL51 Woofer
LF Drivers LF Nd Drivers Coaxials HF Drivers Horns
50 mm (2 in) copper voice coil
70 – 3000 Hz response
94 dB sensitivity
Neodymium magnet allows a very light yet powerful motor assembly
Shorting copper cap for extended HF response
400 W continuous program power capacity
Ventilated voice coil gap for reduced power compression
Specification
Nominal Diameter 200 (8) mm (in)
Nominal Impedance (1) 8 Ohm
Minimum Impedence 6.6 Ohm
Nominal Power Handling (2) 200 W
Continuous Power Handling (3) 400 W
Sensitivity (1W/1m) (4) 94 dB
Frequency Range 65 -3000 Hz
Voice Coil Diameter 51 (2) mm (in)
Winding Material Copper
Former Material Kapton
Winding Depth 16.5 (0.65) mm (in)
Magnetic Gap Depth 8 (5/16) mm (in)
Flux Density 1.05 T
Thiele & Small Parameters
Fs 66 Hz
Re 5.3 Ohm
Qes 0.41
Qms 3.6
Qts 0.37
Vas 14 (0.5) dm3 (ft3)
Sd 220 (34.1) cm2 (in2)
Eta Zero 1 %
Xmax +/- 7 mm
Xvar +/- 7 mm
Mms 28 g
Bl 12.4 Txm
Le 0.5 mH
Mounting and Shipping Info
Overall Diameter 225 mm (8.8 in)
Bolt Circle Diameter 210 mm (8.3 in)
Baffle Cutout Diameter 187 mm (7.4 in)
Depth 90 mm (3.5 in)
Flange and Gasket Thickness 11 mm (0.4 in)
Net Weight 1.8 kg (4 lb)
Shipping Weight 2.2 kg (4.8 lb)
Shipping Box 300x160x180 mm
(11.8x6.3x7.1 in)
1For different impedances, please ask.
22 hours test made with continuous pink noise signal (6 dB crest factor).
Power calculated on rated minimum impedance.
3Power on Continuous Program is defined as 3 dB greater than the
Nominal rating.
4Applied RMS Voltage is set to 2.83V for 8 ohms or 2.0V for 4 ohms
Nominal Impedance