Fostex FF165WK

Full-range

6.3″ / 160 mm
Nominal diameter
50 Hz
Resonance
0.34
Q factor
92 dB
Sensitivity
± 1.85 mm
Linear excursion
90 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
92.3
dB
Frequency response
50 - 21000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
50.0
Hz
Mechanical quality factor
QMS
4.19
Electrical quality factor
QES
0.37
Total quality factor
QTS
0.34

Large signal parameters

Maximum linear excursion
xmax
1.85
mm
Air volume displaced at xmax
VD
24
cm³
Power handling
P
30
W
Program power
Pmax
90
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.5
Ω
Inductance (1kHz)
LE
0.06
mH
VC Diameter
35
mm

Magnet

Force factor
Bl
7.23
N/A
Motor constant
Bl/√RE
2.83
N/√W
Weight
0.848
kg

Diaphragm

Effective diameter
130
mm
Effective area
SD
132
cm²
Moving mass
MMS
9.5
g
Moving mass (without air load)
MMD
8.4
g

Suspensions

Stiffness
KMS
0.94
N/mm
Compliance
CMS
1068
µm/N
Equivalent volume to the compliance
VAS
27.8
L
Mechanical resistance
RMS
0.71
N·s/m

Dimensions

Nominal diameter
6.3
160
mm
Overall diameter
166
mm
Baffle cutout diameter
146
mm
Overall depth
77
mm
Volume occupied by the driver (estimated)
0.58
L
Net weight
1.95
kg
Fostex FF165WK SPL & Impedance
Fostex FF165WK Dimensions

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fS
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SD
220 cm²
60 - 7000 Hz
QTS
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xmax
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SPL1W
92 dB
Bl/√RE
5.09
Pmax
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