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
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
85.0
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
Cerwin Vega SPRO122D Dimensions

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