12″ / 325 mm
Nominal diameter
27 Hz
Resonance
0.43
Q factor
83 dB
Sensitivity
± 21 mm
Linear excursion
3200 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
83.4
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
27.0
Hz
Mechanical quality factor
QMS
4.82
Electrical quality factor
QES
0.47
Total quality factor
QTS
0.43
Large signal parameters
Maximum linear excursion
xmax
21.0
mm
Air volume displaced at xmax
VD
1113
cm³
Power handling
P
1600
W
Program power
Pmax
3200
W
Voice Coil
Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
3.2
Ω
Inductance (1kHz, in series, estimated)
LE
1.74
mH
VC Diameter
81
mm
Winding material
round copper
Magnet
Force factor (in series)
Bl
21.5
N/A
Motor constant
Bl/√RE
12.0
N/√W
Diameter
190
mm
Height
50
mm
Diaphragm
Effective diameter
260
mm
Effective area
SD
530
cm²
Moving mass
MMS
406
g
Moving mass (without air load)
MMD
397
g
Material
Paper with glass fiber
Suspensions
Stiffness
KMS
10.99
N/mm
Compliance
CMS
91
µm/N
Equivalent volume to the compliance
VAS
36.1
L
Mechanical resistance
RMS
14.29
N·s/m
Dimensions
Nominal diameter
12
″
325
mm
Overall diameter
325
mm
Baffle cutout diameter
308
mm
Mounting depth
188
mm
Volume occupied by the driver
4.0
L
Net weight
13.3
kg
Frame material
Aluminium
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Fi Car Audio BTL4 12 D12 x 1 Ω
12″Subwoofer
fS
28 Hz
SD
480 cm²
QTS
0.42
xmax
33.0 mm
SPL1W
83 dB
Bl/√RE
12
Pmax
7000 W
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Fi Car Audio BTL4 12 D22 x 2 Ω
12″Subwoofer
fS
28 Hz
SD
480 cm²
QTS
0.42
xmax
33.0 mm
SPL1W
83 dB
Bl/√RE
12
Pmax
7000 W