18″ / 457 mm
Nominal diameter
27 Hz
Resonance
0.49
Q factor
88 dB
Sensitivity
± 29 mm
Linear excursion
3000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.7
dB
Frequency response
20 - 400
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
27.4
Hz
Mechanical quality factor
QMS
3.60
Electrical quality factor
QES
0.54
Total quality factor
QTS
0.49
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 2
Ω
DC resistance (in series)
RE
3.6
Ω
Inductance (1kHz, in series, estimated)
LE
2.2
mH
VC Diameter
76
mm
Magnet
Force factor (in series)
Bl
20.6
N/A
Motor constant
Bl/√RE
10.9
N/√W
Diameter
211
mm
Diaphragm
Effective diameter
385
mm
Effective area
SD
1164
cm²
Moving mass
MMS
489
g
Moving mass (without air load)
MMD
461.1
g
Suspensions
Stiffness
KMS
14.29
N/mm
Compliance
CMS
70
µm/N
Equivalent volume to the compliance
VAS
136
L
Mechanical resistance
RMS
23.38
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
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
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fS
25 Hz
SD
1210 cm²
QTS
0.52
xmax
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SPL1W
88 dB
Bl/√RE
12
Pmax
7000 W
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SD
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QTS
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25 Hz
SD
1210 cm²
QTS
0.55
xmax
33.0 mm
SPL1W
88 dB
Bl/√RE
12
Pmax
7000 W