18″ / 460 mm
Nominal diameter
35 Hz
Resonance
0.37
Q factor
95 dB
Sensitivity
± 12.45 mm
Linear excursion
2400 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
94.9
dB
Frequency response
35 - 1600
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
35.0
Hz
Mechanical quality factor
QMS
11.10
Electrical quality factor
QES
0.38
Total quality factor
QTS
0.37
Large signal parameters
Maximum linear excursion
xmax
12.45
mm
Maximum excursion before damage
xlim
21.0
mm
Air volume displaced at xmax
VD
1509
cm³
Power handling
P
1200
W
Program power
Pmax
2400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.0
Ω
Inductance (1kHz)
LE
1.26
mH
VC Diameter
100
mm
Winding height
HVC
28.9
mm
Former material
Glass Fiber
Magnet
Flux density
B
1.22
T
Force factor
Bl
24.8
N/A
Motor constant
Bl/√RE
11.1
N/√W
Air gap height
HAG
12
mm
Diaphragm
Effective diameter
393
mm
Effective area
SD
1212
cm²
Moving mass
MMS
211.8
g
Moving mass (without air load)
MMD
182.5
g
Suspensions
Stiffness
KMS
10.0
N/mm
Compliance
CMS
100
µm/N
Equivalent volume to the compliance
VAS
200
L
Mechanical resistance
RMS
4.2
N·s/m
Dimensions
Nominal diameter
18
″
460
mm
Overall diameter
460
mm
Baffle cutout diameter
422
mm
Overall depth
215
mm
Flange thickness
14
mm
Mounting depth
201
mm
Volume occupied by the driver
5.3
L
Net weight
7.3
kg
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fS
34 Hz
SD
1225 cm²
30 - 2500 Hz
QTS
0.36
xmax
10.0 mm
SPL1W
95 dB
Bl/√RE
11
Pmax
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18″Subwoofer
fS
33 Hz
SD
1131 cm²
35 - 1000 Hz
QTS
0.34
xmax
7.5 mm
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Pmax
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fS
40 Hz
SD
1225 cm²
35 - 1000 Hz
QTS
0.34
xmax
10.0 mm
SPL1W
95 dB
Bl/√RE
11
Pmax
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