Fostex FW108HS

Woofer

4″ / 100 mm
Nominal diameter
65 Hz
Resonance
0.46
Q factor
85 dB
Sensitivity
± 1.55 mm
Linear excursion
50 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
84.8
dB
Frequency response
65 - 15000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
65.0
Hz
Mechanical quality factor
QMS
8.78
Electrical quality factor
QES
0.49
Total quality factor
QTS
0.46

Large signal parameters

Maximum linear excursion
xmax
1.55
mm
Air volume displaced at xmax
VD
7.8
cm³
Power handling
P
20
W
Program power
Pmax
50
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
7.2
Ω
Inductance (1kHz)
LE
0.48
mH
VC Diameter
30
mm

Magnet

Force factor
Bl
5.98
N/A
Motor constant
Bl/√RE
2.23
N/√W
Weight
0.5
kg
Material
Ferrite

Diaphragm

Effective diameter
80
mm
Effective area
SD
50
cm²
Moving mass
MMS
6
g
Moving mass (without air load)
MMD
5.7
g

Suspensions

Stiffness
KMS
1.0
N/mm
Compliance
CMS
1005
µm/N
Equivalent volume to the compliance
VAS
3.6
L
Mechanical resistance
RMS
0.28
N·s/m

Dimensions

Nominal diameter
4
100
mm
Overall diameter
128
mm
Baffle cutout diameter
105
mm
Overall depth
74
mm
Volume occupied by the driver (estimated)
0.44
L
Net weight
1.7
kg
Fostex FW108HS SPL & Impedance
Fostex FW108HS Dimensions

Export this driver to a simulation software:

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fS
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SD
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