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
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
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
Fostex FE126En SPL & Impedance
Fostex FE126En Dimensions

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