12″ / 305 mm
Nominal diameter
37 Hz
Resonance
0.4
Q factor
85 dB
Sensitivity
7000 W
Program Power
Discontinued
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Specifications
Sensitivity (1W, 1m, infinite baffle)
SPL1W
85.0
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
37.5
Hz
Mechanical quality factor
QMS
7.61
Electrical quality factor
QES
0.42
Total quality factor
QTS
0.40
Large signal parameters
Power handling
P
3500
W
Program power
Pmax
7000
W
Voice Coil
Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
4.0
Ω
Inductance (1kHz, in series, estimated)
LE
1.94
mH
Magnet
Force factor (in series)
Bl
27.41
N/A
Motor constant
Bl/√RE
13.7
N/√W
Diaphragm
Effective diameter
240
mm
Effective area
SD
453
cm²
Moving mass
MMS
334.4
g
Moving mass (without air load)
MMD
327.3
g
Suspensions
Stiffness
KMS
18.54
N/mm
Compliance
CMS
54
µm/N
Equivalent volume to the compliance
VAS
15.7
L
Mechanical resistance
RMS
10.35
N·s/m
Dimensions
Nominal diameter
12
″
305
mm
Volume occupied by the driver (estimated)
2.4
L
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fS
34 Hz
SD
480 cm²
QTS
0.37
xmax
33.0 mm
SPL1W
85 dB
Bl/√RE
15
Pmax
9000 W
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fS
34 Hz
SD
480 cm²
QTS
0.35
xmax
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SPL1W
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Pmax
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fS
35 Hz
SD
342 cm²
40 - 450 Hz
QTS
0.44
xmax
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SPL1W
85 dB
Bl/√RE
11
Pmax
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