Fostex FE168EΣ
Full-range
6.5″ / 160 mm
Nominal diameter
51 Hz
Resonance
0.26
Q factor
92 dB
Sensitivity
± 1.6 mm
Linear excursion
80 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
92.4
dB
Frequency response
51 - 21000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
51.0
Hz
Mechanical quality factor
QMS
5.33
Electrical quality factor
QES
0.27
Total quality factor
QTS
0.26
Large signal parameters
Maximum linear excursion
xmax
1.6
mm
Air volume displaced at xmax
VD
18
cm³
Power handling
P
27
W
Program power
Pmax
80
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.8
Ω
Inductance (1kHz)
LE
0.06
mH
VC Diameter
30
mm
Magnet
Force factor
Bl
8.0
N/A
Motor constant
Bl/√RE
3.07
N/√W
Weight
0.721
kg
Material
Ferrite
Diaphragm
Effective diameter
120
mm
Effective area
SD
113
cm²
Moving mass
MMS
8.7
g
Moving mass (without air load)
MMD
7.7
g
Suspensions
Stiffness
KMS
0.78
N/mm
Compliance
CMS
1278
µm/N
Equivalent volume to the compliance
VAS
23.7
L
Mechanical resistance
RMS
0.52
N·s/m
Dimensions
Nominal diameter
6.5
″
160
mm
Overall diameter
190
mm
Baffle cutout diameter
155
mm
Overall depth
88
mm
Volume occupied by the driver (estimated)
0.83
L
Net weight
2.6
kg
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6.5″Mid Bass
fS
52 Hz
SD
121 cm²
60 - 2000 Hz
QTS
0.26
xmax
3.5 mm
SPL1W
92 dB
Bl/√RE
3.7
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8″Mid Bass
fS
40 Hz
SD
194 cm²
55 - 3000 Hz
QTS
0.25
xmax
8.0 mm
SPL1W
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Bl/√RE
5.29
Pmax
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6.5″Woofer
fS
60 Hz
SD
147 cm²
60 - 5500 Hz
QTS
0.27
xmax
5.2 mm
SPL1W
92 dB
Bl/√RE
4.52
Pmax
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