Fostex FE166En
Full-range
6.5″ / 160 mm
Nominal diameter
53 Hz
Resonance
0.25
Q factor
96 dB
Sensitivity
± 1 mm
Linear excursion
65 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
95.7
dB
Frequency response
53 - 22000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
53.0
Hz
Mechanical quality factor
QMS
3.43
Electrical quality factor
QES
0.27
Total quality factor
QTS
0.25
Large signal parameters
Maximum linear excursion
xmax
1.0
mm
Air volume displaced at xmax
VD
13
cm³
Power handling
P
22
W
Program power
Pmax
65
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.2
Ω
Inductance (1kHz)
LE
0.05
mH
VC Diameter
25
mm
Magnet
Force factor
Bl
7.65
N/A
Motor constant
Bl/√RE
2.85
N/√W
Weight
0.6
kg
Material
Ferrite
Diaphragm
Effective diameter
130
mm
Effective area
SD
133
cm²
Moving mass
MMS
6.8
g
Moving mass (without air load)
MMD
5.7
g
Suspensions
Stiffness
KMS
0.68
N/mm
Compliance
CMS
1474
µm/N
Equivalent volume to the compliance
VAS
37
L
Mechanical resistance
RMS
0.66
N·s/m
Dimensions
Nominal diameter
6.5
″
160
mm
Overall diameter
166
mm
Baffle cutout diameter
146
mm
Overall depth
75
mm
Volume occupied by the driver (estimated)
0.5
L
Net weight
1.6
kg
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fS
53 Hz
SD
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55 - 12000 Hz
QTS
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xmax
4.6 mm
SPL1W
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Bl/√RE
3.04
Pmax
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8″Full-range
fS
62 Hz
SD
214 cm²
65 - 15000 Hz
QTS
0.30
xmax
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SPL1W
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Bl/√RE
4.35
Pmax
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fS
62 Hz
SD
210 cm²
95 - 3300 Hz
QTS
0.29
xmax
3.2 mm
SPL1W
94 dB
Bl/√RE
4.84
Pmax
500 W