Fi Car Audio Q18 D2

2x1Ω
2x2Ω

Subwoofer

18″ / 476 mm
Nominal diameter
28 Hz
Resonance
0.51
Q factor
90 dB
Sensitivity
± 34 mm
Linear excursion
3500 W
Program Power
Fi Car Audio Q18 D2 SubwooferFi Car Audio Q18 D2 SubwooferFi Car Audio Q18 D2 Subwoofer
Excursion
Velocity
SPL
Phase
Group delay
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
Discard
Apply
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
Impedance
Step response
Tone Burst

Export this driver to a simulation software:

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Similar subwoofers to Fi Car Audio Q18 D2

Fi Car Audio Q18 D1 Subwoofer
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