Fostex FE208EΣ
Full-range
8″ / 200 mm
Nominal diameter
42 Hz
Resonance
0.18
Q factor
97 dB
Sensitivity
± 1.25 mm
Linear excursion
120 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
97.1
dB
Frequency response
42 - 14000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
42.0
Hz
Mechanical quality factor
QMS
6.19
Electrical quality factor
QES
0.19
Total quality factor
QTS
0.18
Large signal parameters
Maximum linear excursion
xmax
1.25
mm
Air volume displaced at xmax
VD
25
cm³
Power handling
P
40
W
Program power
Pmax
120
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.4
Ω
Inductance (1kHz)
LE
0.05
mH
VC Diameter
35
mm
Magnet
Force factor
Bl
10.8
N/A
Motor constant
Bl/√RE
4.27
N/√W
Weight
1.409
kg
Material
Ferrite
Diaphragm
Effective diameter
160
mm
Effective area
SD
201
cm²
Moving mass
MMS
13.3
g
Moving mass (without air load)
MMD
11
g
Suspensions
Stiffness
KMS
0.94
N/mm
Compliance
CMS
1069
µm/N
Equivalent volume to the compliance
VAS
60.1
L
Mechanical resistance
RMS
0.57
N·s/m
Dimensions
Nominal diameter
8
″
200
mm
Overall diameter
230
mm
Baffle cutout diameter
185
mm
Overall depth
94
mm
Volume occupied by the driver (estimated)
1.4
L
Net weight
4.8
kg
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fS
45 Hz
SD
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QTS
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SPL1W
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Bl/√RE
4.28
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SD
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fS
45 Hz
SD
210 cm²
30 - 20000 Hz
QTS
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xmax
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SPL1W
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4.6
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