Fi Car Audio HT-3 18 S4

Subwoofer

18″ / 470 mm
Nominal diameter
21 Hz
Resonance
0.42
Q factor
89 dB
Sensitivity
± 34 mm
Linear excursion
4000 W
Program Power
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
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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