18″ / 462 mm
Nominal diameter
32 Hz
Resonance
0.21
Q factor
96 dB
Sensitivity
± 14 mm
Linear excursion
3600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.3
dB
Frequency response
32 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
32.0
Hz
Mechanical quality factor
QMS
5.00
Electrical quality factor
QES
0.22
Total quality factor
QTS
0.21
Large signal parameters
Maximum linear excursion
xmax
14.0
mm
Air volume displaced at xmax
VD
1711
cm³
Power handling
P
1800
W
Program power
Pmax
3600
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.1
Ω
Inductance (1kHz)
LE
1.2
mH
VC Diameter
135
mm
Magnet
Force factor
Bl
25.0
N/A
Motor constant
Bl/√RE
14.2
N/√W
Material
Neodymium
Diaphragm
Effective diameter
394
mm
Effective area
SD
1222
cm²
Moving mass
MMS
228
g
Moving mass (without air load)
MMD
198.3
g
Material
Weather protected
Suspensions
Stiffness
KMS
9.26
N/mm
Compliance
CMS
108
µm/N
Equivalent volume to the compliance
VAS
247
L
Mechanical resistance
RMS
9.17
N·s/m
Dimensions
Nominal diameter
18
″
462
mm
Overall diameter
462
mm
Baffle cutout diameter
422
mm
Overall depth
237
mm
Flange thickness
26
mm
Mounting depth
211
mm
Volume occupied by the driver (estimated)
7.6
L
Net weight
12.5
kg
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fS
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SD
1158 cm²
30 - 1000 Hz
QTS
0.23
xmax
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SPL1W
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Bl/√RE
14
Pmax
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fS
33 Hz
SD
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QTS
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fS
33 Hz
SD
1164 cm²
30 - 500 Hz
QTS
0.24
xmax
11.0 mm
SPL1W
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Bl/√RE
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Pmax
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