Focal 21 WX Be User Manual

21 WX Be

8’’ Utopia Be® subwoofer

• Multiferrite magnet

• W cone

• For compact closed box

• High power handling

Frequency Response

Specifi cations

Nominal power
Maximum power
Sensitivity (2.83V/m)
Cone
Surround
Nom. impedance
DC resistance
VC diameter
VC height
Former
Layers
Wire
Inductance
Xmax
Magnet (12 units)
Magnet weight
Flux density
Gap height
Net weight

250 W
500 W

86.5 dB
W
Rubber
4 ohm

3.4 ohm
50 mm 2 in
25 mm 1 in
Aluminum
2
Copper

1.13 mH

8.5 mm 0.33 in
15x45 mm 0.6 x1.8 in

1.3 kg 2.9 Ibs

0.85 T
8 mm 0.31 in
4 kg 8.8 Ibs

Mechanical Drawing

©Focal-JMlab - SCFR041108/2

Unit: mm

Parameters

Fs
Vas
Qts
Qes
Qms
Re
Sd
Cas
Mas
Ras
Cms
Mms
Rms
Ces
Les
Res
BI
SPL

36.63 Hz

18.8 I

0.6

0.77

2.81

3.4 ohm

208.67 cm

1.34E-07 m5/N

141.01 kg/m

11549.11 ohm.ac

3.07E-04 m/N

61.4 g

5.029 kg/s
984 mF

19.19 mH

12.41 ohm

7.9 N/A

82.63 dB/W/m

2

4

Suggested application

Load V (l) Fb (Hz) F-3 (Hz) Ql

Sealed 30 - 43 0.77

Sealed 15 - 45 0.907

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