18″ / 460 mm
Nominal diameter
35 Hz
Resonance
0.31
Q factor
96 dB
Sensitivity
± 9.5 mm
Linear excursion
2400 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.0
dB
Frequency response
31 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
35.0
Hz
Mechanical quality factor
QMS
7.20
Electrical quality factor
QES
0.32
Total quality factor
QTS
0.31
Large signal parameters
Maximum linear excursion
xmax
9.5
mm
Air volume displaced at xmax
VD
1164
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.0
Ω
Inductance (1kHz)
LE
1.35
mH
VC Diameter
100
mm
Winding material
Copper
Magnet
Force factor
Bl
25.6
N/A
Motor constant
Bl/√RE
11.4
N/√W
Material
Ferrite
Diaphragm
Effective diameter
395
mm
Effective area
SD
1225
cm²
Moving mass
MMS
192
g
Moving mass (without air load)
MMD
162.3
g
Material
Weather protected
Suspensions
Stiffness
KMS
9.26
N/mm
Compliance
CMS
108
µm/N
Equivalent volume to the compliance
VAS
230
L
Mechanical resistance
RMS
5.86
N·s/m
Dimensions
Nominal diameter
18
″
460
mm
Overall diameter
462
mm
Baffle cutout diameter
416
mm
Overall depth
214
mm
Flange thickness
24
mm
Mounting depth
190
mm
Volume occupied by the driver (estimated)
7.2
L
Net weight
12.75
kg
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fS
35 Hz
SD
1212 cm²
35 - 1600 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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fS
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SD
1164 cm²
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QTS
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xmax
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fS
35 Hz
SD
1110 cm²
35 - 1000 Hz
QTS
0.28
xmax
8.8 mm
SPL1W
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Bl/√RE
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