12″ / 305 mm
Nominal diameter
37 Hz
Resonance
0.6
Q factor
86 dB
Sensitivity
± 11 mm
Linear excursion
800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
86.3
dB
Frequency response
35 - 300
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
36.6
Hz
Mechanical quality factor
QMS
4.20
Electrical quality factor
QES
0.70
Total quality factor
QTS
0.60
Large signal parameters
Maximum linear excursion
xmax
11.0
mm
Air volume displaced at xmax
VD
561
cm³
Power handling
P
500
W
Program power
Pmax
800
W
Voice Coil
Nominal impedance
Z
2 x 4
Ω
DC resistance (in series)
RE
7.1
Ω
Inductance (1kHz, in series, estimated)
LE
2.16
mH
VC Diameter
51
mm
Magnet
Force factor (in series)
Bl
18.2
N/A
Motor constant
Bl/√RE
6.83
N/√W
Diameter
160
mm
Diaphragm
Effective diameter
255
mm
Effective area
SD
510
cm²
Moving mass
MMS
157.6
g
Moving mass (without air load)
MMD
149.4
g
Suspensions
Stiffness
KMS
8.33
N/mm
Compliance
CMS
120
µm/N
Equivalent volume to the compliance
VAS
44.3
L
Mechanical resistance
RMS
8.63
N·s/m
Dimensions
Nominal diameter
12
″
305
mm
Baffle cutout diameter
287
mm
Mounting depth
125
mm
Volume occupied by the driver
2.8
L
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SD
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SD
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