18″ / 476 mm
Nominal diameter
28 Hz
Resonance
0.51
Q factor
90 dB
Sensitivity
± 34 mm
Linear excursion
3500 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
89.8
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
27.9
Hz
Mechanical quality factor
QMS
9.17
Electrical quality factor
QES
0.54
Total quality factor
QTS
0.51
Large signal parameters
Maximum linear excursion
xmax
34.0
mm
Air volume displaced at xmax
VD
4114
cm³
Power handling
P
1750
W
Program power
Pmax
3500
W
Voice Coil
Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
3.6
Ω
Inductance (1kHz, in series, estimated)
LE
1.99
mH
Magnet
Force factor (in series)
Bl
21.4
N/A
Motor constant
Bl/√RE
11.3
N/√W
Diaphragm
Effective diameter
393
mm
Effective area
SD
1210
cm²
Moving mass
MMS
414
g
Moving mass (without air load)
MMD
383.9
g
Suspensions
Stiffness
KMS
12.48
N/mm
Compliance
CMS
80
µm/N
Equivalent volume to the compliance
VAS
164
L
Mechanical resistance
RMS
7.91
N·s/m
Dimensions
Nominal diameter
18
″
476
mm
Overall diameter
476
mm
Baffle cutout diameter
425
mm
Mounting depth
241
mm
Volume occupied by the driver
2.83
L
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SpeakerbenchSimilar subwoofers to Fi Car Audio Q18 D2
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Fi Car Audio Q18 D12 x 1 Ω
18″Subwoofer
fS
28 Hz
SD
1210 cm²
QTS
0.50
xmax
34.0 mm
SPL1W
90 dB
Bl/√RE
11
Pmax
3500 W
.png.webp)
Fi Car Audio Q18 NEO D22 x 2 Ω
18″Subwoofer
fS
28 Hz
SD
1210 cm²
QTS
0.50
xmax
34.0 mm
SPL1W
90 dB
Bl/√RE
11
Pmax
3500 W
.png.webp)
Fi Car Audio Q18 NEO D12 x 1 Ω
18″Subwoofer
fS
28 Hz
SD
1210 cm²
QTS
0.50
xmax
34.0 mm
SPL1W
90 dB
Bl/√RE
11
Pmax
3500 W