18″ / 457 mm
Nominal diameter
26 Hz
Resonance
0.4
Q factor
87 dB
Sensitivity
± 29 mm
Linear excursion
3000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.2
dB
Frequency response
20 - 400
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
26.1
Hz
Mechanical quality factor
QMS
1.80
Electrical quality factor
QES
0.44
Total quality factor
QTS
0.40
Large signal parameters
Maximum linear excursion
xmax
29.0
mm
Air volume displaced at xmax
VD
3376
cm³
Power handling
P
1500
W
Program power
Pmax
3000
W
Voice Coil
Nominal impedance
Z
2 x 1
Ω
DC resistance (in series)
RE
1.8
Ω
Inductance (1kHz, in series, estimated)
LE
1.2
mH
VC Diameter
76
mm
Magnet
Force factor (in series)
Bl
17.1
N/A
Motor constant
Bl/√RE
12.7
N/√W
Diameter
211
mm
Diaphragm
Effective diameter
385
mm
Effective area
SD
1164
cm²
Moving mass
MMS
566
g
Moving mass (without air load)
MMD
538.1
g
Suspensions
Stiffness
KMS
12.5
N/mm
Compliance
CMS
80
µm/N
Equivalent volume to the compliance
VAS
160
L
Mechanical resistance
RMS
51.57
N·s/m
Dimensions
Nominal diameter
18
″
457
mm
Baffle cutout diameter
419
mm
Mounting depth
274
mm
Volume occupied by the driver
5.4
L
Export this driver to a simulation software:
WinISD
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Hornresp
QSpeakers
SpeakerSim
MfbLabs
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fS
24 Hz
SD
855 cm²
25 - 400 Hz
QTS
0.42
xmax
24.0 mm
SPL1W
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Bl/√RE
11
Pmax
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fS
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SD
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QTS
0.45
xmax
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SPL1W
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Bl/√RE
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Pmax
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fS
22 Hz
SD
830 cm²
21 - 600 Hz
QTS
0.32
xmax
12.0 mm
SPL1W
88 dB
Bl/√RE
11
Pmax
1600 W