B&C Speakers Woofer 250 AMX User manual

Speakers HPL Coaxials HF Compression drivers Horns
High efficiency 10" woofer, 2.5" aluminium voice coil. Smooth
response up to 2.5 kHz and 500 W power handling makes this
speaker ideal for compact two-way bass-reflex cabinets.
Specification
Nominal Diameter 250 mm (10 in)
Nominal Impedance 8 Ω
Minumum Impedance 6 Ω
Power Handling
(70 –700 Hz)
Nominal1250 W
Continuous Program2500 W
Sensitivity (1W/1m)398 dB
Frequency Range 65-3500 Hz
Voice Coil Diameter 65 mm (2.5 in)
Winding Material Aluminium
Former Material Glass Fibre
Winding Depth 12 mm (1/2 in)
Magnetic Gap Depth 8 mm (5/16 in)
Flux Density 1.2 T
Also available in 4 Ω, data upon request
Thiele & Small Parameter 4
Fs 66 Hz
Re 5.3 Ω
Qes 0.3
Qms 5.3
Qts 0.28
Vas 30 dm3(1.1 ft3)
Sd 320 cm2( 9.1 in2)
η02.8%
X max ± 2. mm
X var ± 5 mm
Mms 28 g
Bl 1 .2 T·m
Le 1.2 mH
Mounting and Shipping Information
Overall Diameter 260 mm (10.2 in)
Bolt Circle Diameter 2 mm (9.6 in)
Baffle Cutout Diameter 228 mm (8.8 in)
Depth 105 mm ( .1 in)
Flange and Gasket Thickness 17 mm (2/3 in)
Net Weight (1 unit) .9 kg (10.8 lb)
Shipping Weight (2 units) 10. kg (22.9 lb)
Shipping Box (2 units) 280x280x260 mm
(11x11x10.2 in)
1 2 hours test made with continuous pink noise signal (6 dB crest factor) within the
specified range. Power calculated on rated minimum impedance. Loudspeaker in
free air.
2 Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
3 Applied RMS Voltage is set to 2.83V for 8 ohms Nominal Impedance. Average
SPL from 200 to 3000 Hz.
Thiele-Small parameters are measured after a high level 20 Hz sine wave precon-
ditioning test.
250 AMX |Woofer