B&C Speakers 8 PL 21 User Manual

B&C

Nominal Diameter

200 mm (8 in.)

Nominal Impedance

8 

Ω

Minumum Impedance

6.6 

Ω

Power Handling
(90 –900 Hz)
Nominal

1

200 W 

Continuous Program

2

400 W

Sensitivity (1W/1m)

3

99 dB

Frequency Range

90-5000 Hz

Voice Coil Diameter

50 mm (2 in.)

Winding Material

Aluminium

Former Material

Kapton 

Winding Depth

9 mm (11/32 in.)

Magnetic Gap Depth

8 mm (5/16 in.)

Flux Density

1.25 T

Ω

Fs

94 Hz

Re

5.4 

Ω

Qes

0.3

Qms

5.5

Qts

0.29

Vas

13 dm.

3

(0.46 cu. ft.) 

Sd

220 cm.

2

(34.1 sq. in.)

η

0

3.4 %

X max

± 1 mm.

Mms

15 gr.

Bl

12.7 Tm

Le

0.3 mH

Overall Diameter

225 mm. (8.8 in.)

Bolt Circle Diameter

210 mm. (8.3 in.)

Baffle Cutout Diameter

187 mm. (7.4 in.)

Depth

89 mm. (3.5 in.)

Flange and Gasket Thickness

9.5 mm. (3/8 in.)

Net Weight 

4.4  Kg. (9.7 lb.) 

Shipping Weight 

4.7 Kg. (10.3 lb.)

Shipping Box 

220x220x130 mm

(8.7x8.7x5.1 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 and 4V for 16 ohms Nominal

Impedance. Average SPL from 200 to 4000 Hz.

4 

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

ditioning test.