Fostex FW208HS
Woofer
8″ / 200 mm
Nominal diameter
32 Hz
Resonance
0.4
Q factor
87 dB
Sensitivity
± 8.8 mm
Linear excursion
100 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
86.6
dB
Frequency response
32 - 7000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
32.0
Hz
Mechanical quality factor
QMS
12.93
Electrical quality factor
QES
0.42
Total quality factor
QTS
0.40
Large signal parameters
Maximum linear excursion
xmax
8.8
mm
Air volume displaced at xmax
VD
181
cm³
Power handling
P
50
W
Program power
Pmax
100
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.5
Ω
Inductance (1kHz)
LE
0.43
mH
VC Diameter
65
mm
Magnet
Force factor
Bl
10.57
N/A
Motor constant
Bl/√RE
4.14
N/√W
Weight
1.41
kg
Material
Ferrite
Diaphragm
Effective diameter
162
mm
Effective area
SD
206
cm²
Moving mass
MMS
37
g
Moving mass (without air load)
MMD
34.6
g
Suspensions
Stiffness
KMS
1.0
N/mm
Compliance
CMS
1005
µm/N
Equivalent volume to the compliance
VAS
42.7
L
Mechanical resistance
RMS
0.58
N·s/m
Dimensions
Nominal diameter
8
″
200
mm
Overall diameter
230
mm
Baffle cutout diameter
185
mm
Overall depth
109
mm
Volume occupied by the driver (estimated)
1.5
L
Net weight
4.62
kg
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SpeakerbenchSimilar woofers to Fostex FW208HS
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8″Mid-range
fS
28 Hz
SD
207 cm²
28 - 4500 Hz
QTS
0.38
xmax
4.8 mm
SPL1W
86 dB
Bl/√RE
3.98
Pmax
120 W
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10″Subwoofer
fS
26 Hz
SD
338 cm²
25 - 500 Hz
QTS
0.31
xmax
10.0 mm
SPL1W
87 dB
Bl/√RE
7.27