Cerwin Vega SPRO122D
Subwoofer
12″ / 314 mm
Nominal diameter
25 Hz
Resonance
0.26
Q factor
85 dB
Sensitivity
± 33 mm
Linear excursion
4000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.0
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
25.0
Hz
Mechanical quality factor
QMS
2.20
Electrical quality factor
QES
0.29
Total quality factor
QTS
0.26
Large signal parameters
Maximum linear excursion
xmax
33.0
mm
Air volume displaced at xmax
VD
1617
cm³
Power handling
P
2000
W
Program power
Pmax
4000
W
Voice Coil
Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
2.9
Ω
Inductance (1kHz, in series, estimated)
LE
1.38
mH
Magnet
Force factor (in series)
Bl
22.8
N/A
Motor constant
Bl/√RE
13.5
N/√W
Diaphragm
Effective diameter
250
mm
Effective area
SD
490
cm²
Moving mass
MMS
336
g
Moving mass (without air load)
MMD
328
g
Suspensions
Stiffness
KMS
8.26
N/mm
Compliance
CMS
121
µm/N
Equivalent volume to the compliance
VAS
41.7
L
Mechanical resistance
RMS
23.99
N·s/m
Dimensions
Nominal diameter
12
″
314
mm
Overall diameter
314
mm
Baffle cutout diameter
283
mm
Mounting depth
262
mm
Volume occupied by the driver
6.1
L
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Fi Car Audio SP4 12v2+ D12 x 1 Ω
12″Subwoofer
fS
28 Hz
SD
480 cm²
QTS
0.29
xmax
33.0 mm
SPL1W
85 dB
Bl/√RE
15
Pmax
7000 W