18″ / 460 mm
Nominal diameter
35 Hz
Resonance
0.32
Q factor
95 dB
Sensitivity
± 12.45 mm
Linear excursion
2400 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.8
dB
Frequency response
35 - 1600
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
35.0
Hz
Mechanical quality factor
QMS
12.30
Electrical quality factor
QES
0.33
Total quality factor
QTS
0.32
Large signal parameters
Maximum linear excursion
xmax
12.45
mm
Maximum excursion before damage
xlim
23.1
mm
Air volume displaced at xmax
VD
1509
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
2.9
Ω
Inductance (1kHz)
LE
1.08
mH
VC Diameter
100
mm
Winding height
HVC
28.9
mm
Winding material
Copper
Former material
Glass Fiber
Magnet
Flux density
B
1.1
T
Force factor
Bl
21.7
N/A
Motor constant
Bl/√RE
12.7
N/√W
Air gap height
HAG
12
mm
Material
Ferrite Ring
Diaphragm
Effective diameter
393
mm
Effective area
SD
1212
cm²
Moving mass
MMS
246.3
g
Moving mass (without air load)
MMD
217
g
Suspensions
Stiffness
KMS
12.5
N/mm
Compliance
CMS
80
µm/N
Equivalent volume to the compliance
VAS
172
L
Mechanical resistance
RMS
4.4
N·s/m
Dimensions
Nominal diameter
18
″
460
mm
Overall diameter
460
mm
Baffle cutout diameter
421
mm
Overall depth
208
mm
Flange thickness
14
mm
Mounting depth
194
mm
Volume occupied by the driver
6.5
L
Net weight
12.1
kg
Frame material
Aluminium
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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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