18″ / 460 mm
Nominal diameter
30 Hz
Resonance
0.29
Q factor
97 dB
Sensitivity
± 9.25 mm
Linear excursion
1200 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.9
dB
Frequency response
30 - 2500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
30.0
Hz
Mechanical quality factor
QMS
13.60
Electrical quality factor
QES
0.30
Total quality factor
QTS
0.29
Large signal parameters
Maximum linear excursion
xmax
9.25
mm
Maximum excursion before damage
xlim
21.0
mm
Air volume displaced at xmax
VD
1117
cm³
Power handling
P
600
W
Program power
Pmax
1200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.1
Ω
Inductance (1kHz)
LE
1.06
mH
VC Diameter
77
mm
Winding height
HVC
22
mm
Winding material
Copper
Former material
Glass Fiber
Magnet
Flux density
B
1.2
T
Force factor
Bl
21.0
N/A
Motor constant
Bl/√RE
9.3
N/√W
Air gap height
HAG
10.5
mm
Material
Ferrite Ring
Diaphragm
Effective diameter
392
mm
Effective area
SD
1207
cm²
Moving mass
MMS
139
g
Moving mass (without air load)
MMD
109.8
g
Suspensions
Stiffness
KMS
5.0
N/mm
Compliance
CMS
200
µm/N
Equivalent volume to the compliance
VAS
412
L
Mechanical resistance
RMS
1.9
N·s/m
Dimensions
Nominal diameter
18
″
460
mm
Overall diameter
460
mm
Baffle cutout diameter
421
mm
Overall depth
202
mm
Flange thickness
14
mm
Mounting depth
188
mm
Volume occupied by the driver
6.1
L
Net weight
8.8
kg
Frame material
Aluminium
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SD
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SD
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SD
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