Fostex W Series, W400A-HR Specifications
Features
Frequency Response / Impedance
Dimensions & Mounting Information
Overall Diameter :
Baffle Hole Diameter
:
Depth :
mm / in
mm / in
mm / in
Specifications
&
Thiele/Small Parameters
a :
Sd :
Zn :
Fs :
Re :
Le :
Qms :
Qes :
Qts :
Mms :
BL :
Vas :
Xmax :
Eff/η0 :
Cms :
EBP :
mm
m
2
Ω
Hz
Ω
mH
g
Telsa/m
L
mm
%
mm/N
Size :
Voice Coil Diameter
:
Cast / Stamped :
Impedance :
Reproduction Frequency Response
:fs -
Sound Pressure Level
:
Rated Input :
Music Power :
Magnet Material :
Magnet Weight :
Net Weight
mm / in
mm / in
Ω
kHz
dB/W(m)
W
W
g / lb
g / lb
W400A-HR
W-series
395 15
100 3.9
Cast
8
2.5
94
67
200
Alnico
3,100 6.83
21,400 47.18
395 15
350 13
242 9.5
• 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.
161.3
0.082
8
25
6
2.64
8.2
0.32
0.31
130
19.5
310
5.5
1.4
0.33
78.1
10 20 50 100 200 500 1K 2K 5K 10K 20K
110
100
90
80
70
60
50
40
30
20
Hz
dB
32
16
8
64
Ω
ø395
ø194
ø350
242
18
115
109
ø372.5
8-9.5 X 7
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