Focal Sub 10

Subwoofer

10″ / 271 mm
Nominal diameter
21 Hz
Resonance
0.53
Q factor
81 dB
Sensitivity
500 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
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
Focal Sub 10 Dimensions

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