Fi Car Audio Alpha 12 S4

2Ω
4Ω

Subwoofer

12″ / 305 mm
Nominal diameter
32 Hz
Resonance
0.56
Q factor
86 dB
Sensitivity
± 17 mm
Linear excursion
1200 W
Program Power
Discontinued
Fi Car Audio Alpha 12 S4 SubwooferFi Car Audio Alpha 12 S4 SubwooferFi Car Audio Alpha 12 S4 Subwoofer
Excursion
Velocity
SPL
Phase
Group delay
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
85.8
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
32.4
Hz
Mechanical quality factor
QMS
7.17
Electrical quality factor
QES
0.61
Total quality factor
QTS
0.56

Large signal parameters

Maximum linear excursion
xmax
17.0
mm
Air volume displaced at xmax
VD
816
cm³
Power handling
P
600
W
Program power
Pmax
1200
W

Voice Coil

Nominal impedance
Z
4
Ω
DC resistance
RE
3.1
Ω
Inductance (1kHz, estimated)
LE
1.03
mH

Magnet

Force factor
Bl
13.63
N/A
Motor constant
Bl/√RE
7.74
N/√W

Diaphragm

Effective diameter
247
mm
Effective area
SD
480
cm²
Moving mass
MMS
181
g
Moving mass (without air load)
MMD
173.4
g

Suspensions

Stiffness
KMS
7.39
N/mm
Compliance
CMS
135
µm/N
Equivalent volume to the compliance
VAS
43.7
L
Mechanical resistance
RMS
5.14
N·s/m

Dimensions

Nominal diameter
12
″
305
mm
Volume occupied by the driver (estimated)
2.4
L
Impedance
Step response
Tone Burst

Export this driver to a simulation software:

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fS
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SD
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QTS
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SD
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