15″ / 401 mm
Nominal diameter
27 Hz
Resonance
0.54
Q factor
87 dB
Sensitivity
± 18 mm
Linear excursion
1800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.0
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
27.2
Hz
Mechanical quality factor
QMS
11.50
Electrical quality factor
QES
0.56
Total quality factor
QTS
0.54
Large signal parameters
Maximum linear excursion
xmax
18.0
mm
Air volume displaced at xmax
VD
1440
cm³
Power handling
P
900
W
Program power
Pmax
1800
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
19.8
N/A
Motor constant
Bl/√RE
9.9
N/√W
Diameter
191
mm
Diaphragm
Effective diameter
319
mm
Effective area
SD
800
cm²
Moving mass
MMS
335.5
g
Moving mass (without air load)
MMD
318.8
g
Suspensions
Stiffness
KMS
9.8
N/mm
Compliance
CMS
102
µm/N
Equivalent volume to the compliance
VAS
93.1
L
Mechanical resistance
RMS
4.99
N·s/m
Dimensions
Nominal diameter
15
″
401
mm
Overall diameter
401
mm
Baffle cutout diameter
346
mm
Mounting depth
186
mm
Volume occupied by the driver
2.63
L
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SD
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QTS
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SPL1W
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SD
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SD
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QTS
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xmax
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SPL1W
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Bl/√RE
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