12″ / 320 mm
Nominal diameter
31 Hz
Resonance
0.57
Q factor
85 dB
Sensitivity
± 18.5 mm
Linear excursion
1500 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.1
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
30.5
Hz
Mechanical quality factor
QMS
13.30
Electrical quality factor
QES
0.60
Total quality factor
QTS
0.57
Large signal parameters
Maximum linear excursion
xmax
18.5
mm
Air volume displaced at xmax
VD
907
cm³
Power handling
P
750
W
Program power
Pmax
1500
W
Voice Coil
Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
3.7
Ω
Inductance (1kHz, in series, estimated)
LE
1.37
mH
Magnet
Force factor (in series)
Bl
16.0
N/A
Motor constant
Bl/√RE
8.32
N/√W
Diameter
165
mm
Diaphragm
Effective diameter
250
mm
Effective area
SD
490
cm²
Moving mass
MMS
217.7
g
Moving mass (without air load)
MMD
209.6
g
Suspensions
Stiffness
KMS
8.0
N/mm
Compliance
CMS
125
µm/N
Equivalent volume to the compliance
VAS
42.5
L
Mechanical resistance
RMS
3.14
N·s/m
Dimensions
Nominal diameter
12
″
320
mm
Overall diameter
320
mm
Baffle cutout diameter
272
mm
Mounting depth
152
mm
Volume occupied by the driver
2.29
L
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fS
31 Hz
SD
330 cm²
QTS
0.56
xmax
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SPL1W
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Bl/√RE
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Pmax
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30 Hz
SD
454 cm²
25 - 100 Hz
QTS
0.56
xmax
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SPL1W
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Bl/√RE
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Pmax
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