Fostex FE83-Sol User manual

Full Range Speaker
Owner’s Manual
Insatiate creativity
New lineup to evolve
FE83-Sol is a special full-range driver unit inheriting its own technology and development philosophy of FE103-Sol and it has been developed
based on FE83En. Quality of mid-high frequency sound is further improved by two-layer paper-making and low distortion ferrite outer magnet
circuit, and it offers higher resolution with delicate and articulate music reproduction. In addition, the newly designed damper has excellent
linearity, even at a very low level input, it accurately follows the change of the input signal. Frame color is the same copper orange as the
FE103-Sol, which expresses our passion and own technology to build sound. Please enjoy the newly evolved lineup of FE83.
●ES cone diaphragm with Two-layer paper-making
Based on the cone paper of FE83En, combining smooth high density ES cone using fine pieces of fiber with two-layer paper-making*, it
achieves light weight but further high stiffness and high internal loss. The base layer is mainly built with the long fiber pulp to offer high stiff-
ness and internal loss, and the surface layer is built with short fiber pulp to enhance the propagation speed of cone paper surface. Due to this,
while keeping bright and high tension mid range sound as is, it has enabled sharp high frequency with good response and rich low frequency
reproduction.
*Two-layer paper-making is; making a piece of diaphragm in two steps process with our unique paper-making technique that consists of base
layer and surface layer.
●High compliance corrugation damper
In order to improve linearity, it uses a superior corrugation damper; although being high compliance, it has consistency in hardness regardless
of input level from small to large and offers excellent movement.
●Low distortion ferrite outer magnet circuit
The magnetic circuit has secured a sufficient magnetic flux density by using Ø65 mm ferrite magnet. The magnetic circuit has achieved to
reduce the current distortion by placing the copper cap to the peripheral portion of magnet and the pole piece, and to improve the clarity of the
mid-high frequency with thorough low distortion of the drive system.
●Mechanical 2 way center cap/high heat resistance glass composite voice coil bobbin
Center cap is located as directly mounted to the voice coil bobbin to offer wider high frequency reproduction and achieves over 20 kHz
frequency range. Also, the voice coil bobbin ensures transmitting the vibrations to center cap by employing glass fiber and phenol resin sheet
that has high Young ratio.
●3-point bonding method
It uses a three-point bonding method, which adhere the cone paper, the damper and the voice coil in the same place. High frequency response is
improved by increasing the strength of neck of cone.
●Fasten #205 gold plated terminal
It uses fasten #205 low loss gold plated speaker terminal. It ensures speaker cable connection and avoid sound quality deterioration.
Thank you for purchasing our product. Read this
manual thoroughly before using the product.
FE83-Sol
FE83-Sol Main Features

Ø73
Ø40
136
70
120
260
210
12 198
115
12
Ø48
35
236
25
60
2-Ø13 hole
112
90
85
Ø86
Plus (+) terminal
Ø70
15
2
46.8
17.825.5
RED MARKING
Ø65
35
35 35
68
4-4×6 slotted hole
900
260×2
600
35×2
15×8
90×2
236×2
198×2 112136 198
112×4
Internal capacity : 4.9 liters
Tuning freq. (fb) : 89 Hz
Duct diameter : Ø40
Duct length : 68 mm
A: 4 + 6 + 5
B : A + 2 + 3
C : B + 8* + 8*
* #8 is for both lateral boards.
D: C + (1 + 7) + 9 + 9
Terminal : P24B x 2 sets
Internal wire : SFC83 adequate length
Board : MDF 900 mm x 600 mm t12 x 1
Duct : Ø40 PVC pipe, 60 mm x 2 pcs.
Acoustic absorption material : wool, coarse felt adequate dose
Type : 8 cm cone full-range
Impedance : 8 ohm
Lowest resonance frequency : 135 Hz
Reproduction frequency range : f0to 40 kHz
S.P.L. : 88 dB/1w(m)
Input (MUS.) : 15 W (NOM. 5 W)
m0: 1.53 g
Q0: 0.65
Effective vibration radius : 3.0 cm
Magnet weight : 187 g
Mass : 470 g
Baffle opening dimensions : Ø73
Wood screws x 4
Washer x 4
Packing x 1
[dB]
10
20
30
40
50
60
70
80
90
100
110
20 50 10010 [Hz] 200 500 1k 2k 5k 10k 20k 50k
64
32
16
8
4
[Ω]
0°
30°
60°
Impedance
Standard Bass Reflex Enclosure
This is an example of installing FE83-Sol into the standard capacity bass
reflex enclosure. Its design emphasizes full-body bass rather than being too
ambitious on the lowest frequency. Caution to take when assembling the
enclosure; adjust the mounting dimensions of duct with its actual size. As for
the acoustic absorption material, attach coarse felt on the bottom board, wool
on the ceiling board, rear board and lateral board.
Dimensional Outline Drawing
83
Specifications
Accessories Frequency Response
Frequency Response
Board Cutting Drawing
Parts Used
Design Value Assembly Sequence
Assembly Drawing Duct hole process dimensions
(Back side of board )
Ø48 counterbore 4 mm deep
10
20
30
40
50
60
70
80
90
100
110
64
32
16
8
4
20 50 100[Hz] 200 500 1k 2k 5k 10k 20k 50k
[dB]
[Ω]
128
Impedance

1820
910
106×3
40 260×2
650×2 224×2
100×3
130×4
146
150
106×3
105×2 73×4
550
638
300248
100×2 191×2
450
900
200×4
300 106
410×2
Ø73
650
40
70
130
106 72
260
156
20
192300
146
36 410
298 100
32
12
83
139
97 12
12
105
638
58
25
2-Ø13 hole
24
200
130
300
224 12
52
10050
12
A
A'
12
100
50
100
5959
150
50
106
Ø8 hole
50
191
90
204
106
32×2
106×4
(27)
173
192
97 (rest)
12×2
(27)
rest
105
This is an example of installing FE83-Sol into the back loaded horn type enclosure. It is a
two-division structure of the body and the stand and the stand bottom sides is the horn open-
ing. Follow the assembly order, but in advance, mark the guide line with pencil on the board
#2 for the position to adhere the board #10 and #12 (lateral boards). We recommend using
generous portion of adhesive at the end face of the board #8 and #10 to fill the gap because
they are bonded to the diagonal. The internal wire will go through the Ø8 hole of board #8,
but this should be done before adhering the board #3. After assembling the main body and
the stand, place the body to the stand. For fall prevention, fix the board #15 and #17 with
either adhesive or screws. As for acoustic absorption material, we recommend inserting thin
wool inside the air compartment and attach coarse felt on the both sides of stand board #20.
Back Loaded Horn Enclosure
Air compartment : 0.99 liters
Throat dimension : 21.2 square cm
Horn opening dimension : 224 square cm
Horn length: 185 cm
Horn cross-over freq. : 250 Hz
Cut-off freq. : 35 Hz
Broadening coefficient : 1.14
Terminal : P24B x 2 sets
Internal wire : SFC83 adequate length
Board : China plywood 910 mm x 1820 mm t12 x 1
: MDF 900 mm x 450 mm t12 x 1
Acoustic absorption material: wool / coarse felt x adequate dose
10
20
30
40
50
60
70
80
90
100
110
64
32
16
8
4
20 50 100[Hz] 200 500 1k 2k 5k 10k 20k 50k
[dB]
[Ω]
128
Impedance
Design Value
Parts Used
Assembly Sequence
Assembly Drawing
Board Cutting Drawing
Completion Drawing
Main body
Stand
Horn Opening
Main body Bottom Side of Main body
Stand
A-A’ Cutaway
Drawing
Board Process
Dimensions
Ø8 hole size should fit
with the thickness of
cable used.
Stand
I : 17 + 20 + 19 + 21 + 18
J : I + 22 + 22
Main body
A : 6 + 13
B : 4 + 13 + 13
C : (5 + 13) + 1 + 11 + 7
D : 12 + 9
E : 10 + 14 + 14
F : 2 + C + B + A
G : F + D + E + 3
H : G + (15 + 16 + 16)

FE83-Sol Thiele/Small Parameters
in
in
in
in
in
lb
lb
80
83
73
46.8
16.4
Stamped
8
Fs - 40
88
5
15
187
470
30
60
3.2
3.3
2.9
1.85
0.65
0.412
1.036
Size
Overall Diameter
Baffle Hole Diameter
Depth
Voice Coil Diameter
Cast / Stamped
Impedance
Reproduction Frequency Response
Sound Pressure Level
Rated Input
Music Power
Magnet Weight
Net Weight
Equivalent Diaphragm Radius
Effective Cone Diameter
a
D
mm
mm
mm
mm
mm
ohm
kHz
dB/W (1m)
W
W
g
g
mm
mm
Surface Area of Cone
Nominal Impedance
Resonance Frequency
DC Resistance
Coil Inductance
Mechanical Q
Electromagnetic Q
Total Q
Equivalent Mass
BL Product (Factor Force)
Compliance Equivalent Volume
Voice Coil Overhang
Reference Efficiency n0
Mechanical Compliance of Suspension
Efficiency Bandwidth Product
Sd
Zn
Fs
Re
Le
Qms
Qes
Qts
Mms
BL
Vas
Xmax
Eff/n0
Cms
EBP
m2
ohm
Hz
ohm
mH
g
Tesla/m
L
mm
%
mm/N
0.0028
8
135
6.9
0.3
3.62
0.79
0.65
1.53
3.53
0.88
0.25
0.35
0.75
170.886
FOSTEX CO.
© PRINTED IN CHINA AUGUST 2016 611683
1-1-109, Tsutsujigaoka, Akishima City, Tokyo, 196-8550, Japan
• Read this manual carefully before starting operation and use this
product safely. We cannot be responsible for problems resulting
from failure to observe the instructions in this manual.
• This manual uses various pictorial displays to show how to use
this product and to avoid harm to yourself and others and damage
to your property. Here is what these pictorial displays mean.
IMPORTANT SAFETY INSTRUCTIONS
• Do not disassemble or alter. Doing so may lead to accident, fire or
electric shock.
• Do not place the speaker cabinet (enclosure) on an unstable cart,
stand or tripod, bracket, or table. It may fall, causing serious injury
and / or serious damage.
• Do not expose the product to rain or moisture, never wet the inside
with any liquid and never pour or spill liquids directly onto this
product. Please do not put any objects filled with liquids (e.g.
vases, etc.) onto the speaker cabinet.
WARNING
CAUTION
This label is intended to alert the user to the
presence of important operating instruc-
tions. Failure to heed the instructions will
result in severe injury or death.
This label is intended to alert the user to the
presence of important operating instruc-
tions. Failure to heed the instructions can
result in injury or material damage.
WARNING
CAUTION
• After taking the product out of the plastic bag, be sure to dispose
of it out of the reach of children. Otherwise, they may play with
the bag, which could cause hazard of suffocation. Also keep small
articles out of reach of children. If swallowed, consult a physician
immediately.
• Halt use immediately if a problem appears. When problems occur
such as a lack of sound, foreign objects inside the unit, smoke
coming out, or noxious odors, stop use immediately and contact
the dealer where you bought the product. Failure to do so may
result in an accident or injury.
• Never expose this product to extremely high or low temperatures.
• High SPL’ s may damage your hearing! Please do not get close to
the loudspeakers when using them at high volumes.
• Please note that the diaphragm build up a magnetic field. Do not
play with magnetic items at close range to the diaphragms.
• Use specified accessory parts and install them securely. Use of
other than designated parts may damage the product internally or
may not securely install the product in place as parts that come
loose may create hazards.
• Avoid touching the speaker membranes and do not block the
woofer’s ventilation ports.
• Always use fully checked cables. Defective cables can harm your
speakers. They are a common source for any kind of noise, hum,
crackling, etc.