Fostex FE126En
Full-range
4.7″ / 120 mm
Nominal diameter
83 Hz
Resonance
0.3
Q factor
94 dB
Sensitivity
± 0.35 mm
Linear excursion
45 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.4
dB
Frequency response
83 - 25000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
83.0
Hz
Mechanical quality factor
QMS
4.80
Electrical quality factor
QES
0.33
Total quality factor
QTS
0.30
Large signal parameters
Maximum linear excursion
xmax
0.35
mm
Air volume displaced at xmax
VD
2.3
cm³
Power handling
P
15
W
Program power
Pmax
45
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.2
Ω
Inductance (1kHz)
LE
0.04
mH
VC Diameter
20
mm
Magnet
Force factor
Bl
5.63
N/A
Motor constant
Bl/√RE
2.1
N/√W
Weight
0.44
kg
Material
Ferrite
Diaphragm
Effective diameter
92
mm
Effective area
SD
65
cm²
Moving mass
MMS
2.8
g
Moving mass (without air load)
MMD
2.4
g
Suspensions
Stiffness
KMS
0.74
N/mm
Compliance
CMS
1350
µm/N
Equivalent volume to the compliance
VAS
8.5
L
Mechanical resistance
RMS
0.3
N·s/m
Dimensions
Nominal diameter
4.7
″
120
mm
Overall diameter
115
mm
Baffle cutout diameter
104
mm
Overall depth
61
mm
Volume occupied by the driver (estimated)
0.25
L
Net weight
0.99
kg
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5″Coaxial
fS
75 Hz
SD
95 cm²
75 - 20000 Hz
QTS
0.27
xmax
5.7 mm
SPL1W
93 dB
Bl/√RE
3.2
Pmax
300 W
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6.5″Mid Bass
fS
95 Hz
SD
130 cm²
200 - 7000 Hz
QTS
0.32
xmax
3.0 mm
SPL1W
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Bl/√RE
3.73
Pmax
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4″Full-range
fS
77 Hz
SD
50 cm²
77 - 23000 Hz
QTS
0.30
xmax
0.3 mm
SPL1W
92 dB
Bl/√RE
1.99
Pmax
24 W