Fostex FE88-Sol

Full-range

3.4″ / 85 mm
Nominal diameter
100 Hz
Resonance
0.45
Q factor
89 dB
Sensitivity
± 1.1 mm
Linear excursion
15 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
89.1
dB
Frequency response
100 - 30000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
100
Hz
Mechanical quality factor
QMS
3.91
Electrical quality factor
QES
0.51
Total quality factor
QTS
0.45

Large signal parameters

Maximum linear excursion
xmax
1.1
mm
Air volume displaced at xmax
VD
4.1
cm³
Power handling
P
10
W
Program power
Pmax
15
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
7.0
Ω
Inductance (1kHz)
LE
0.06
mH
VC Diameter
16
mm

Magnet

Force factor
Bl
4.47
N/A
Motor constant
Bl/√RE
1.69
N/√W
Weight
0.584
kg

Diaphragm

Effective diameter
69
mm
Effective area
SD
37
cm²
Moving mass
MMS
2.2
g
Moving mass (without air load)
MMD
2
g

Suspensions

Stiffness
KMS
0.96
N/mm
Compliance
CMS
1040
µm/N
Equivalent volume to the compliance
VAS
2
L
Mechanical resistance
RMS
0.35
N·s/m

Dimensions

Nominal diameter
3.4
85
mm
Overall diameter
112
mm
Baffle cutout diameter
90
mm
Overall depth
57
mm
Volume occupied by the driver (estimated)
0.26
L
Net weight
1.145
kg
Fostex FE88-Sol SPL & Impedance
Fostex FE88-Sol Dimensions

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