Focal Sub 12
Subwoofer
12″ / 324 mm
Nominal diameter
24 Hz
Resonance
0.48
Q factor
86 dB
Sensitivity
600 W
Program Power
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Sensitivity (1W, 1m, infinite baffle)
SPL1W
86.1
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
24.0
Hz
Mechanical quality factor
QMS
5.15
Electrical quality factor
QES
0.44
Total quality factor
QTS
0.48
Large signal parameters
Power handling
P
300
W
Program power
Pmax
600
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.0
Ω
Inductance (1kHz, estimated)
LE
0.88
mH
VC Diameter
50
mm
Magnet
Force factor
Bl
12.0
N/A
Motor constant
Bl/√RE
6.93
N/√W
Diameter
145
mm
Diaphragm
Effective diameter
245
mm
Effective area
SD
471
cm²
Moving mass
MMS
150
g
Moving mass (without air load)
MMD
142.2
g
Material
Polypropylene
Suspensions
Stiffness
KMS
3.45
N/mm
Compliance
CMS
290
µm/N
Equivalent volume to the compliance
VAS
90
L
Mechanical resistance
RMS
4.4
N·s/m
Surround material
Butyl
Dimensions
Nominal diameter
12
″
324
mm
Overall diameter
324
mm
Baffle cutout diameter
281
mm
Mounting depth
130
mm
Volume occupied by the driver (estimated)
2.4
L
Net weight
5.5
kg
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fS
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fS
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SD
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