B&C Speakers 15 TBX 40 Dépliant

Nominal Diameter

380 mm (15 in)

Nominal Impedance

8 

Ω

Minumum Impedance

6.1 

Ω

Power Handling
(40 –400 Hz)
Nominal

1

1000 W

Continuous Program

2

2000 W

Sensitivity (1W/1m)

3

97 dB

Frequency Range

35 -1800 Hz

Voice Coil Diameter

100 mm (4 in)

Winding Material

Copper

Former Material

Glass Fibre 

Winding Depth

25 mm (1 in)

Magnetic Gap Depth

12 mm (.47 in)

Flux Density

1.1 T

Ω, data upon request

Fs

38 Hz

Re

5.2 

Ω

Qes

0.29

Qms

6.3

Qts

0.28

Vas

131 dm

3

(4.6 ft

3

) 

Sd

855 cm

2

(132.5 in

2

)

η

0

2.3 %

X max

± 9 mm

X Var

± 11 mm

Mms

141 g

Bl

24.6 T·m

Le

1.8 mH

Overall Diameter

394 mm (15.5 in)

Bolt Circle Diameter

374 mm (14.6 in)

Baffle Cutout Diameter

355 mm (13.9 in)

Depth

158 mm (6.2 in)

Flange and Gasket Thickness

16 mm (0.63 in)

Net weight  

10.2 kg (22.4 lb) 

Shipping Weight 

11.5 kg (25.3 lb)

Shipping Box  

450x450x200 mm

(17.7x17.7x8 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 1200Hz.

4 

Thiele-Small parameters are measured after a high level 20 Hz sine wave precon-

ditioning test.

2000 W power handling, 4" voice coil with very high thermal

capability and a ventilated magnet assembly that allows a low power

compression. A very low distortion figure is obtained using a double

spider design and dual demodulation rings in the magnetic path.

Proprietary water-proof cone treatment for safe use in adverse

climatic conditions. State of the art performance, in the smallest

possible enclosure, set the 15 TBX 40  as a benchmark loudspeaker.