Fostex FF225WK

Full-range

8″ / 200 mm
Nominal diameter
44 Hz
Resonance
0.35
Q factor
93 dB
Sensitivity
± 2.25 mm
Linear excursion
100 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
92.8
dB
Frequency response
44 - 17000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
44.0
Hz
Mechanical quality factor
QMS
2.31
Electrical quality factor
QES
0.41
Total quality factor
QTS
0.35

Large signal parameters

Maximum linear excursion
xmax
2.25
mm
Air volume displaced at xmax
VD
50
cm³
Power handling
P
34
W
Program power
Pmax
100
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.0
Ω
Inductance (1kHz)
LE
0.07
mH
VC Diameter
50
mm

Magnet

Force factor
Bl
8.49
N/A
Motor constant
Bl/√RE
3.47
N/√W
Weight
1.067
kg

Diaphragm

Effective diameter
168
mm
Effective area
SD
220
cm²
Moving mass
MMS
18.4
g
Moving mass (without air load)
MMD
16
g

Suspensions

Stiffness
KMS
1.21
N/mm
Compliance
CMS
826
µm/N
Equivalent volume to the compliance
VAS
57.9
L
Mechanical resistance
RMS
2.2
N·s/m

Dimensions

Nominal diameter
8
200
mm
Overall diameter
208
mm
Baffle cutout diameter
185
mm
Overall depth
92
mm
Volume occupied by the driver (estimated)
1.1
L
Net weight
3.52
kg
Fostex FF225WK SPL & Impedance
Fostex FF225WK Dimensions

Export this driver to a simulation software:

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10Low frequency
fS
41 Hz
SD
346 cm²
45 - 5000 Hz
QTS
0.36
xmax
6.7 mm
SPL1W
91 dB
Bl/√RE
6.22
Pmax
600 W