18″ / 460 mm
Nominal diameter
32 Hz
Resonance
0.3
Q factor
94 dB
Sensitivity
± 14 mm
Linear excursion
3400 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
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Parts Express
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.1
dB
Frequency response
35 - 1500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
32.0
Hz
Mechanical quality factor
QMS
5.60
Electrical quality factor
QES
0.32
Total quality factor
QTS
0.30
Large signal parameters
Maximum linear excursion
xmax
14.0
mm
Air volume displaced at xmax
VD
1694
cm³
Power handling
P
1700
W
Program power
Pmax
3400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.3
Ω
Inductance (1kHz)
LE
1.9
mH
VC Diameter
116
mm
Winding height
HVC
34
mm
Former material
Glass Fibre
Magnet
Flux density
B
1.16
T
Force factor
Bl
30.3
N/A
Motor constant
Bl/√RE
13.2
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
275
g
Moving mass (without air load)
MMD
245.8
g
Material
Waterproof Both Sides
Suspensions
Stiffness
KMS
11.11
N/mm
Compliance
CMS
90
µm/N
Equivalent volume to the compliance
VAS
187
L
Mechanical resistance
RMS
9.87
N·s/m
Dimensions
Nominal diameter
18
″
460
mm
Overall diameter
460
mm
Baffle cutout diameter
422
mm
Overall depth
242
mm
Flange thickness
16
mm
Mounting depth
226
mm
Volume occupied by the driver
10.5
L
Net weight
11.9
kg
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18″Subwoofer
fS
32 Hz
SD
1225 cm²
35 - 1000 Hz
QTS
0.30
xmax
17.5 mm
SPL1W
94 dB
Bl/√RE
14
Pmax
4000 W
18″Subwoofer
fS
35 Hz
SD
1200 cm²
30 - 1000 Hz
QTS
0.33
xmax
15.3 mm
SPL1W
94 dB
Bl/√RE
14
Pmax
3600 W
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fS
30 Hz
SD
1200 cm²
30 - 1000 Hz
QTS
0.28
xmax
14.0 mm
SPL1W
95 dB
Bl/√RE
13
Pmax
3600 W