18″ / 460 mm
Nominal diameter
30 Hz
Resonance
0.2
Q factor
95 dB
Sensitivity
± 16.5 mm
Linear excursion
3400 W
Program Power
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Available on (affiliate link)
Parts Express
$$$
Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.8
dB
Frequency response
30 - 500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
30.0
Hz
Mechanical quality factor
QMS
4.30
Electrical quality factor
QES
0.21
Total quality factor
QTS
0.20
Large signal parameters
Maximum linear excursion
xmax
16.5
mm
Air volume displaced at xmax
VD
1997
cm³
Power handling
P
1700
W
Program power
Pmax
3400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.0
Ω
Inductance (1kHz)
LE
3.85
mH
VC Diameter
116
mm
Winding height
HVC
40
mm
Winding material
Aluminium
Former material
Glass Fibre
Magnet
Flux density
B
0.8
T
Force factor
Bl
39.0
N/A
Motor constant
Bl/√RE
17.4
N/√W
Air gap height
HAG
14
mm
Material
Neodymium Inside Slug
Diaphragm
Effective diameter
393
mm
Effective area
SD
1210
cm²
Moving mass
MMS
330
g
Moving mass (without air load)
MMD
300.8
g
Material
Waterproof Both Sides
Suspensions
Stiffness
KMS
12.05
N/mm
Compliance
CMS
83
µm/N
Equivalent volume to the compliance
VAS
168
L
Mechanical resistance
RMS
14.47
N·s/m
Spider material
Silicone
Dimensions
Nominal diameter
18
″
460
mm
Overall diameter
460
mm
Baffle cutout diameter
422
mm
Overall depth
248
mm
Flange thickness
16
mm
Mounting depth
232
mm
Volume occupied by the driver
10.0
L
Net weight
12.55
kg
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SD
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QTS
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SPL1W
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Bl/√RE
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Pmax
3400 W
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SD
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SD
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35 - 1500 Hz
QTS
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xmax
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SPL1W
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Pmax
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