12″ / 305 mm
Nominal diameter
35 Hz
Resonance
0.62
Q factor
88 dB
Sensitivity
± 7 mm
Linear excursion
500 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.5
dB
Frequency response
30 - 600
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
35.1
Hz
Mechanical quality factor
QMS
5.90
Electrical quality factor
QES
0.69
Total quality factor
QTS
0.62
Large signal parameters
Maximum linear excursion
xmax
7.0
mm
Air volume displaced at xmax
VD
351
cm³
Power handling
P
250
W
Program power
Pmax
500
W
Voice Coil
Nominal impedance
Z
2 x 4
Ω
DC resistance (in series)
RE
7.1
Ω
Inductance (1kHz, in series, estimated)
LE
1.71
mH
VC Diameter
51
mm
Magnet
Force factor (in series)
Bl
14.8
N/A
Motor constant
Bl/√RE
5.55
N/√W
Diameter
140
mm
Diaphragm
Effective diameter
253
mm
Effective area
SD
502
cm²
Moving mass
MMS
108.2
g
Moving mass (without air load)
MMD
100.2
g
Suspensions
Stiffness
KMS
5.26
N/mm
Compliance
CMS
190
µm/N
Equivalent volume to the compliance
VAS
67.8
L
Mechanical resistance
RMS
4.0
N·s/m
Dimensions
Nominal diameter
12
″
305
mm
Baffle cutout diameter
290
mm
Mounting depth
135
mm
Volume occupied by the driver
1.4
L
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fS
35 Hz
SD
498 cm²
30 - 600 Hz
QTS
0.61
xmax
7.0 mm
SPL1W
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Bl/√RE
5.88
Pmax
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fS
35 Hz
SD
346 cm²
30 - 800 Hz
QTS
0.59
xmax
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SPL1W
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Bl/√RE
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Pmax
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