18″ / 470 mm
Nominal diameter
21 Hz
Resonance
0.42
Q factor
89 dB
Sensitivity
± 34 mm
Linear excursion
4000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
88.9
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
21.3
Hz
Mechanical quality factor
QMS
6.94
Electrical quality factor
QES
0.45
Total quality factor
QTS
0.42
Large signal parameters
Maximum linear excursion
xmax
34.0
mm
Air volume displaced at xmax
VD
4114
cm³
Power handling
P
2000
W
Program power
Pmax
4000
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.3
Ω
Inductance (1kHz, estimated)
LE
2.01
mH
Magnet
Force factor
Bl
21.79
N/A
Motor constant
Bl/√RE
12.0
N/√W
Diaphragm
Effective diameter
393
mm
Effective area
SD
1210
cm²
Moving mass
MMS
484
g
Moving mass (without air load)
MMD
454.2
g
Suspensions
Stiffness
KMS
8.69
N/mm
Compliance
CMS
115
µm/N
Equivalent volume to the compliance
VAS
236
L
Mechanical resistance
RMS
9.33
N·s/m
Dimensions
Nominal diameter
18
″
470
mm
Overall diameter
470
mm
Baffle cutout diameter
425
mm
Mounting depth
165
mm
Volume occupied by the driver
5.1
L
Export this driver to a simulation software:
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SpeakerbenchSimilar subwoofers to Fi Car Audio HT-3 18 S4
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18″Subwoofer
fS
21 Hz
SD
1210 cm²
QTS
0.42
xmax
34.0 mm
SPL1W
89 dB
Bl/√RE
12
Pmax
4000 W
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15″Subwoofer
fS
20 Hz
SD
829 cm²
20 - 200 Hz
QTS
0.48
xmax
16.0 mm
SPL1W
87 dB
Bl/√RE
8.01
Pmax
900 W
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15″Subwoofer
fS
23 Hz
SD
779 cm²
22 - 400 Hz
QTS
0.44
xmax
11.0 mm
SPL1W
88 dB
Bl/√RE
8.31
Pmax
850 W