B&C Speakers 12CXT User Manual

12CXT

Coaxials

400 W continuous program power capacity

90° nominal coverage

50 – 20000 Hz response

98 dB sensitivity

XO-2 dedicated crossover network

LF Drivers LF Nd Drivers Coaxials HF Drivers Horns

Specifications

Nominal Diameter 320 mm (12 in)
Nominal Impedance 8 ohm
Minimum Impedance 6 ohm (LF)

7.3 ohm (HF)
Frequency Range 50 - 20000 Hz
Dispersion Angle (1) 90°
LF Unit
Sensitivity (1W/1m) (2) 98 dB
Nominal Power Handling (3) 200 W
Continuous Power Handling (4) 400 W
Voice Coil Diameter 51 mm (2 in)
Winding Material Copper
HF Unit
Sensitivity (1W/1m) (5) 102 dB
Nominal Power Handling (6) 25 W
Continuous Power Handling (7) 50 W
Voice Coil Diameter 36 mm (1.4 in)
Winding Material Aluminium
Diaphragm Material Mylar
Recom. Crossover (8) 2.2 kHz

Parameters

Fs 49 Hz
Re 5.3 ohm
Qes 0.35
Qms 3.9
Qts 0.32
Vas 91 dm3 (3.2 ft3)
Sd 522 cm2 (80.9 in2)
Eta Zero 3.1 %
Xmax +/- 3 mm
Xvar +/- 5.5 mm
Mms 43 g
Bl 14.4 Txm
Le 1.2 mH

Mounting and Shipping Info

Overall Diameter 316 mm (12.4 in)
Bolt Circle Diameter 296 mm (11.6 in)
Baffle Cutout Diameter 284 mm (11.2 in)
Depth 179 mm (7.05 in)
Flange and Gasket Thickness 13 mm (0.5 in)
Net Weight 5.6 kg (12.3 lb)
Shipping Weight 6.8 kg (15 lb)
Shipping Box 380x380x240 mm

(15.2x15x9.4 in)

Crossover

Model XO-2
Filter Type Two way
Nominal Impedance 8 Ohm
Crossover Frequency 1.8 kHz
Slope 6 dB/oct. (Low)

Overall Dimensions 142x107 mm (5.6x4.2 in)
Weight 0.4 kg (0.9 lb)

1

Included by –6 dB down points, averaged from 1 kHz to 8 kHz with B&C
XO-2 crossover filter.

2

Applied RMS Voltage is set to 2.83V for 8 ohms Nominal Impedance.

3

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.

4

Power on Continuous Program is defined as 3 dB greater than the
Nominal rating.

5

Applied RMS Voltage is set to 2.83V for 8 ohms Nominal Impedance.

6

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.

7

Power on Continuous Program is defined as 3 dB greater than the
Nominal rating.

8

12 dB/oct. or higher slope high-pass filter.

12 db/oct. with eq. (High)