Fostex W400A-HR User Manual
Features
• Hi-rigid and reduced inherent resonance HR
diaphragm is employed. By using the radial papermaking technique and whizzy hybrid materials, HR diaphragm realizes low distortion,
high durability, large internal-loss and fast
propagation speed like a metal diaphragm. This
unique-shaped diaphragm offers smooth frequency response and superior low frequency
reproduction that the conventional cone diaphragm has never achieved.
•Newly developed zincky die-cast frame
based on the strength analysis by the fineelement method.
• Stronger magnetic circuit using 3,100g alnico
magnet is equipped for higher input durability
and larger amplitude driving.
•Oval mounting hole can be adjusted between
ø370 - ø375mm. W400A-HR has the compatibility with not only FOSTEX old 15” drivers
but some famous woofers’ replacements.
• UDR tangential surround & spider are
equipped to realize the less anti-resonance
and superior amplitude characteristic.
W-series
W400A-HR
Specifications
&
Thiele/Small Parameters
Size :
Voice Coil Diameter
:
Cast / Stamped :
Impedance :
Reproduction Frequency Response
:fs -
Sound Pressure Level
:
Rated Input :
Music Power :
Magnet Material :
Magnet Weight :
Net Weight
Mms :
Xmax :
Eff/η0 :
3,100 6.83
21,400 47.18
a :
Sd :
Zn :
Fs :
Re :
Le :
Qms :
Qes :
Qts :
BL :
Vas :
Cms :
EBP :
395 15
mm / in
100 3.9
mm / in
Cast
8
Ω
2.5
kHz
94
dB/W(m)
67
W
200
W
Alnico
g / lb
g / lb
161.3
mm
25
2.64
8.2
0.32
0.31
130
19.5
310
5.5
1.4
0.33
78.1
m
8
Ω
Hz
6
Ω
mH
g
Telsa/m
L
mm
%
mm/N
2
0.082
Frequency Response / Impedance
dB
110
100
90
80
70
60
50
40
30
20
10 20 50 100 200 500 1K 2K 5K 10K 20K
Hz
Dimensions & Mounting Information
8-9.5 X 7
ø372.5
Overall Diameter :
Baffle Hole Diameter
Depth :
ø395
ø194
ø350
395 15
:
350 13
242 9.5
mm / in
mm / in
mm / in
Ω
64
32
16
8
18
115
242
109
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