B&C Speakers 6NDL38 User manual

6NDL38 Woofer
LF Drivers LF Nd Drivers Coaxials HF Drivers Horns
38 mm (1.5 in) copper voice coil 
70 - 6000 Hz response 
92 dB sensitivity 
Neodymium magnet allows a very light yet powerful motor assembly 
Aluminium demodulating ring allows a very low distortion figure 
300 W continuous program power capacity
Specification
Nominal Diameter 170 (6.5) mm (in)
Nominal Impedance (1) 8 Ohm
Minimum Impedence 6 Ohm
Nominal Power Handling (2) 150 W
Continuous Power Handling (3) 300 W
Sensitivity (1W/1m) (4) 92 dB
Frequency Range 70 - 6000 Hz
Voice Coil Diameter 38 (1.5) mm (in)
Winding Material Copper
Former Material Kapton
Winding Depth 12 (0.5) mm (in)
Magnetic Gap Depth 6 (0.25) mm (in)
Flux Density 1.15 T
Thiele & Small Parameters
Fs 72 Hz
Re 5.2 Ohm
Qes 0.44
Qms 11.5
Qts 0.42
Vas 7 (0.25) dm3 (ft3)
Sd 132 (20.5) cm2 (in2)
Eta Zero 0.6 %
Xmax +/- 6 mm
Xvar +/- 5.5 mm
Mms 17 g
Bl 9.5 Txm
Le 0.6 mH
Mounting and Shipping Info
Overall Diameter 187 mm (7.4 in)
Bolt Circle Diameter 172 mm (6.7 in)
Baffle Cutout Diameter 145 mm (5.7 in)
Depth 85 mm (3.3 in)
Flange and Gasket Thickness 11 mm (0.4 in)
Net Weight 1.2 kg (2.6 lb)
Shipping Weight (4 units) 6.1 kg (13.4 lb)
Shipping Box (4 units) 405x225x210 mm
(15.9x8.8x8.3 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