Fostex W300AII
Woofer
12″ / 300 mm
Nominal diameter
25 Hz
Resonance
0.28
Q factor
93 dB
Sensitivity
± 6.5 mm
Linear excursion
150 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
92.5
dB
Frequency response
25 - 3000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
25.0
Hz
Mechanical quality factor
QMS
9.17
Electrical quality factor
QES
0.29
Total quality factor
QTS
0.28
Large signal parameters
Maximum linear excursion
xmax
6.5
mm
Air volume displaced at xmax
VD
350
cm³
Power handling
P
50
W
Program power
Pmax
150
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
7.0
Ω
Inductance (1kHz)
LE
0.1
mH
VC Diameter
80
mm
Magnet
Force factor
Bl
18.75
N/A
Motor constant
Bl/√RE
7.09
N/√W
Weight
1.1
kg
Material
Alnico
Diaphragm
Effective diameter
262
mm
Effective area
SD
539
cm²
Moving mass
MMS
92.7
g
Moving mass (without air load)
MMD
83.8
g
Suspensions
Stiffness
KMS
17.86
N/mm
Compliance
CMS
56
µm/N
Equivalent volume to the compliance
VAS
227
L
Mechanical resistance
RMS
1.59
N·s/m
Dimensions
Nominal diameter
12
″
300
mm
Overall diameter
317
mm
Baffle cutout diameter
280
mm
Overall depth
180
mm
Volume occupied by the driver (estimated)
3.2
L
Net weight
6.3
kg
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SD
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xmax
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SPL1W
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SD
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