18″ / 462 mm
Nominal diameter
37 Hz
Resonance
0.31
Q factor
95 dB
Sensitivity
± 14.75 mm
Linear excursion
3600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.7
dB
Frequency response
30 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
37.0
Hz
Mechanical quality factor
QMS
10.80
Electrical quality factor
QES
0.32
Total quality factor
QTS
0.31
Large signal parameters
Maximum linear excursion
xmax
14.75
mm
Air volume displaced at xmax
VD
1807
cm³
Power handling
P
1800
W
Program power
Pmax
3600
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.3
Ω
Inductance (1kHz)
LE
1.59
mH
VC Diameter
115
mm
Winding height
HVC
36
mm
Winding material
Copper
Magnet
Force factor
Bl
26.7
N/A
Motor constant
Bl/√RE
14.7
N/√W
Air gap height
HAG
13
mm
Material
Neodymium
Diaphragm
Effective diameter
395
mm
Effective area
SD
1225
cm²
Moving mass
MMS
296
g
Moving mass (without air load)
MMD
266.3
g
Material
Weather protected
Suspensions
Stiffness
KMS
15.87
N/mm
Compliance
CMS
63
µm/N
Equivalent volume to the compliance
VAS
127
L
Mechanical resistance
RMS
6.37
N·s/m
Dimensions
Nominal diameter
18
″
462
mm
Overall diameter
462
mm
Baffle cutout diameter
422
mm
Overall depth
233
mm
Flange thickness
23
mm
Mounting depth
210
mm
Volume occupied by the driver (estimated)
7.3
L
Net weight
12.0
kg
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QSpeakers
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fS
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SD
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30 - 500 Hz
QTS
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SPL1W
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Bl/√RE
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Pmax
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SD
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SD
900 cm²
30 - 1500 Hz
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SPL1W
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