Fostex FE87E Specifications

Features

• 'ES cone' paper made of ba-
nana plant's fiber
• Newly designed center cap
• Repulsion type magnetically
shielded circuit
• Ferrite magnet
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
48.4
(main) :
(cancel) : 27.9
Net Weight 288
a :
D :
0.00283
Sd :
Zn :
Fs :
Re :
Le :
Qms : 3.77
Qes : 1.20
Qts : 0.92
Mms :
BL : 2.81
1.03
Vas :
0.40
Xmax :
0.22
Eff/η0 :
0.00092
Cms :
EBP :
LOW LEAKAGE FLUX TYPE FULL RANGE
80 3
mm / in
16 mm / 0.6 in
Frequency Response / Impedance
Stamped
8 Ω
110
100
30 kHz
90
80
89 dB/W(m)
70
5 W
60
10 W
50
Ferrite
(dB)
0.107
g / lb
g / 0.062 lb
g / 0.635 lb
Dimensions & Mounting Information
30
mm
60
mm
2
m
8
Ω
140 Hz
ø77.4
7.7 Ω
n/a mH
1.4 g
Telsa/m
L
mm
%
mm/N
117
FE87E
Impedance
20 Hz 50 100 200 500
R43

Overall Diameter :

Baffle Hole Diameter

Depth

SPEAKER UNIT
1k 2k 5k 10k 20k 40k
4-4 X 6
ø70
ø53.8
ø75
83
83 mm / 3.3
: 70 mm / 2.8
: 45.6 mm / 1.8
Ω
16
8
4
in
in
in