Fostex FW305
Woofer
12″ / 300 mm
Nominal diameter
25 Hz
Resonance
0.31
Q factor
93 dB
Sensitivity
± 4.8 mm
Linear excursion
125 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
93.4
dB
Frequency response
25 - 3500
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
25.0
Hz
Mechanical quality factor
QMS
2.73
Electrical quality factor
QES
0.28
Total quality factor
QTS
0.31
Large signal parameters
Maximum linear excursion
xmax
4.8
mm
Air volume displaced at xmax
VD
253
cm³
Power handling
P
40
W
Program power
Pmax
125
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.6
Ω
Inductance (1kHz, estimated)
LE
1.05
mH
Magnet
Force factor
Bl
14.3
N/A
Motor constant
Bl/√RE
5.57
N/√W
Weight
1.41
kg
Diaphragm
Effective diameter
259
mm
Effective area
SD
527
cm²
Moving mass
MMS
55
g
Moving mass (without air load)
MMD
46.4
g
Suspensions
Stiffness
KMS
1.55
N/mm
Compliance
CMS
645
µm/N
Equivalent volume to the compliance
VAS
254
L
Mechanical resistance
RMS
3.16
N·s/m
Dimensions
Nominal diameter
12
″
300
mm
Overall diameter
312
mm
Baffle cutout diameter
280
mm
Overall depth
121
mm
Volume occupied by the driver (estimated)
2.1
L
Net weight
5.0
kg
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SpeakerbenchSimilar woofers to Fostex FW305
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12″Woofer
fS
30 Hz
SD
495 cm²
30 - 4000 Hz
QTS
0.31
xmax
2.5 mm
SPL1W
93 dB
Bl/√RE
4.59
Pmax
200 W
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