18″ / 462 mm
Nominal diameter
38 Hz
Resonance
0.28
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
30 - 2300
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
38.0
Hz
Mechanical quality factor
QMS
6.00
Electrical quality factor
QES
0.29
Total quality factor
QTS
0.28
Large signal parameters
Maximum linear excursion
xmax
14.0
mm
Air volume displaced at xmax
VD
1813
cm³
Power handling
P
1800
W
Program power
Pmax
3600
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
2.7
Ω
Inductance (1kHz)
LE
1.53
mH
VC Diameter
135
mm
Winding material
Aluminum
Magnet
Force factor
Bl
25.0
N/A
Motor constant
Bl/√RE
15.2
N/√W
Material
Neodymium
Diaphragm
Effective diameter
406
mm
Effective area
SD
1295
cm²
Moving mass
MMS
255
g
Moving mass (without air load)
MMD
223.5
g
Suspensions
Stiffness
KMS
14.49
N/mm
Compliance
CMS
69
µm/N
Equivalent volume to the compliance
VAS
111
L
Mechanical resistance
RMS
10.15
N·s/m
Dimensions
Nominal diameter
18
″
462
mm
Overall diameter
462
mm
Baffle cutout diameter
416
mm
Overall depth
236
mm
Flange thickness
26
mm
Mounting depth
210
mm
Volume occupied by the driver (estimated)
7.7
L
Net weight
12.8
kg
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SD
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Bl/√RE
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SD
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SD
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30 - 1500 Hz
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