Focal Sub 10
Subwoofer
10″ / 271 mm
Nominal diameter
21 Hz
Resonance
0.53
Q factor
81 dB
Sensitivity
500 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
80.5
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
21.0
Hz
Mechanical quality factor
QMS
6.88
Electrical quality factor
QES
0.57
Total quality factor
QTS
0.53
Large signal parameters
Power handling
P
250
W
Program power
Pmax
500
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.3
Ω
Inductance (1kHz, estimated)
LE
1.09
mH
VC Diameter
50
mm
Magnet
Force factor
Bl
11.6
N/A
Motor constant
Bl/√RE
6.39
N/√W
Diameter
140
mm
Diaphragm
Effective diameter
200
mm
Effective area
SD
314
cm²
Moving mass
MMS
180
g
Moving mass (without air load)
MMD
175.7
g
Material
Polypropylene
Suspensions
Stiffness
KMS
3.03
N/mm
Compliance
CMS
330
µm/N
Equivalent volume to the compliance
VAS
45
L
Mechanical resistance
RMS
3.45
N·s/m
Surround material
Butyl
Dimensions
Nominal diameter
10
″
271
mm
Overall diameter
271
mm
Baffle cutout diameter
236
mm
Mounting depth
111
mm
Volume occupied by the driver (estimated)
1.9
L
Net weight
4.5
kg
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10″Shallow Subwoofer
fS
22 Hz
SD
312 cm²
QTS
0.46
xmax
12.0 mm
SPL1W
82 dB
Bl/√RE
6.04
Pmax
400 W