B&C Speakers 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.

Specifications

Nominal Diameter 250 mm (10 in)
Nominal Impedance 8 Ω
Minumum Impedance 6 Ω
Power Handling
(70 –700 Hz)
Nominal

1

250 W

Continuous Program

2

500 W

Sensitivity (1W/1m)

3

98 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 Parameters

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(49.1 in2)

η

0

2.8%
X max ± 2.4 mm
X var ± 5 mm
Mms 28 g
Bl 14.2 T·m
Le 1.2 mH

Mounting and Shipping Information

Overall Diameter 260 mm (10.2 in)
Bolt Circle Diameter 244 mm (9.6 in)
Baffle Cutout Diameter 228 mm (8.8 in)
Depth 105 mm (4.1 in)
Flange and Gasket Thickness 17 mm (2/3 in)
Net Weight (1 unit) 4.9 kg (10.8 lb)
Shipping Weight (2 units) 10.4 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.

4

Thiele-Small parameters are measured after a high level 20 Hz sine wave precon­ditioning test.

250 AMX | Woofer