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
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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
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SpeakerbenchSimilar woofers to Fostex FF225WK
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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
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10″Subwoofer
fS
40 Hz
SD
344 cm²
40 - 2500 Hz
QTS
0.37
xmax
7.4 mm
SPL1W
90 dB
Bl/√RE
6.08
Pmax
600 W