18″ / 460 mm
Nominal diameter
32 Hz
Resonance
0.36
Q factor
94 dB
Sensitivity
± 12.92 mm
Linear excursion
3200 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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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.2
dB
Frequency response
30 - 1500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
32.0
Hz
Mechanical quality factor
QMS
9.30
Electrical quality factor
QES
0.37
Total quality factor
QTS
0.36
Large signal parameters
Maximum linear excursion
xmax
12.92
mm
Maximum excursion before damage
xlim
28.0
mm
Air volume displaced at xmax
VD
1566
cm³
Power handling
P
1600
W
Program power
Pmax
3200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.4
Ω
Inductance (1kHz)
LE
1.45
mH
VC Diameter
100
mm
Winding height
HVC
31
mm
Former material
Glass Fiber
Magnet
Flux density
B
1.05
T
Force factor
Bl
26.7
N/A
Motor constant
Bl/√RE
11.5
N/√W
Air gap height
HAG
15.5
mm
Material
Neodymium Slug Crown
Diaphragm
Effective diameter
393
mm
Effective area
SD
1212
cm²
Moving mass
MMS
240
g
Moving mass (without air load)
MMD
210.7
g
Suspensions
Stiffness
KMS
10.0
N/mm
Compliance
CMS
100
µm/N
Equivalent volume to the compliance
VAS
211
L
Mechanical resistance
RMS
5.2
N·s/m
Dimensions
Nominal diameter
18
″
460
mm
Overall diameter
460
mm
Baffle cutout diameter
422
mm
Overall depth
231
mm
Flange thickness
14
mm
Mounting depth
217
mm
Volume occupied by the driver
7.3
L
Net weight
12.2
kg
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15″Low frequency
fS
33 Hz
SD
897 cm²
35 - 2000 Hz
QTS
0.36
xmax
8.0 mm
SPL1W
94 dB
Bl/√RE
8.73
Pmax
1600 W
18″Subwoofer
fS
33 Hz
SD
1164 cm²
30 - 700 Hz
QTS
0.35
xmax
11.0 mm
SPL1W
94 dB
Bl/√RE
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Pmax
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21″Subwoofer
fS
32 Hz
SD
1680 cm²
30 - 1000 Hz
QTS
0.36
xmax
15.0 mm
SPL1W
94 dB
Bl/√RE
16
Pmax
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