Focal BombA 27 User Manual

27 V1

270mm (11") Polyglass subwoofer

50mm / 4 layers voice-coil

•

• Polyglass cone

• Zamak basket

Response curve

Vented enclosure

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 (hxd)
Magnet weight
Flux density
Gap height
Net weight

Parameters

250 W
500 W
90 dB
Polyglass
Butyl
4 ohm

2.9 ohm
50 mm 2 in
20 mm 3/4 in
Aluminum
4
Copper

1.5 mH
6 mm 1/4 in
120 x 25 mm 4
870 g 1.93 lb

0.8 T
8 mm 0.31 in

3.95 kg 8.7 Ib

3/4

x 1 in

15 litres (0.530 cu. ft.)
F - 3 = 46Hz /
Fast and tight bass

20 litres (0.706 cu. ft.)
F - 3 = 40Hz / Punchy
and dynamic bass

30 litres (1.059 cu. ft.)
F - 3 = 33Hz / Deep
and articulate bass

Mechanical Drawing

©Focal-JMlab - SCFR050504/1

SPL (dB) 1W/1m

Frequency (Hz)

Unit: mm

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

39.01 Hz

21.43 I 0.75 Ft

0.44

0.51

3.47

2.9 ohm

2

330 cm

1.53E-07 m5/N

109.11 kg/m

7707.32 ohm.ac

1.40E-04 m/N

118.87 g 0.25 lb

8.40 kg/s

717.49 mF

23.20 mH

19.73 ohm

12.87 N/A

85.8 dB/W/m

4

51

1/16

in

Suggested application

Load Vol Fb F-3 (Hz) Ql

Vented 15 l 51 46 7
Vented 20 l 44 40 7
Vented 30 l 36 33 7

3

2

108, rue de l'Avenir - BP 374 - 42353 La Talaudière cedex - France - Tel. [phone] - Fax [phone] - www.focal-fr.com

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