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| Technics SE-A100 |
300,000yen (1985 release)
279,000 yen(1989 amendment) |
@
Stereo power amplifier which carries a ClassAA
circuitry.
Respectively different amplifier is made to take charge of
voltage control amplifier and electric-current drive amplifier in a ClassAA
circuitry. Thereby, voltage control amplifier was released from the current
supply source, and the Low-noise-izing is realized by a voltage control being
faithfully attained to an input signal. Moreover, electric-current drive amplifier was stabilized, and could supply the electric current required for a
speaker drive, and the speaker drive capacity to have excelled is acquired.
In SE-A100, it has VC-4 composition which carries a total of voltage control
amplifier and four sets of electric-current drive amplifier in each two right
and left.
The Darlington stream composition which has an output
transistor of a differential-amplification input stage and Pc150Wx2ch by a one
chip Dual FET in voltage control amplifier is adopted, and it has become the
perfect first class amplifier which realizes the super-low distortion for which
the threshold of measured value is pressed.
Moreover, electric-current drive amplifier is the high-slew-rate swing amplification stage which allotted the
bootstrap power supply an FET differential-amplification input and newly
developed feed-forward type,It consists of output stages of Pc450Wx2/ch, and
four-step Darlington using the output transistor of 3 parallel, and the large
current for obtaining powerful power is supplied by 50 A/mu s.
Three
transformer stream compositions are adopted as a power-source part, and the
power transformer for electric-current drive amplifier of each right and left
and the transformer for voltage drive amplifier on either side are carried.
Moreover, in order to eliminate the cross interferencee of a right-and-left
channel, the perfect symmetry construction is adopted. Furthermore, to the
capacitor for power sources, it is total, and a 91,200-micro F electrolytic
capacitor is carried.
While using an oxygen-free-high-conductivity-copper
line for a power transformer, the high-density and the efficient technology by a
full sort coil method are given, and the modification of the regulation is
achieved. Furthermore, it is ~(ing) by the special resin in the magnetic
shielding case of three-fold total, and ill effects, such as an equipment
oscillation and a magnetic flux leakage, are stopped.
In order to stop
that the electromagnetic radiation treating large currents, such as an output
stage and a power-source part, from a section has an ill effect, the original
concentrated power block which unified the output stage and the power-source
part is adopted, and the influence of electromagnetic field is suppressed.
The top plate is considering it as a 2.3kg heavy weight class by 3mm
thickness, and is suppressing the magnetic radiation and the equipment
oscillation together with adoption of the 2mm thickness insulator rubber at the
high-rigidity chassis of 2mm thickness, and the bottom face of a transformer.
moreover, the punching network with a high open aperture ratio is used for a
top plate and a sole plate, and the radiator which determined form in a computer
analysis, and a space at the bottom are secured -- the high heat-dissipation
effect has been acquired with the large-sized foot (high and phi50mm) 21mm.
To the earth line, the oxygen-free-high-conductivity-copper bus bar of
thickness 2mm.10mm width has been arranged, and the LC-OFC code is adopted
as product-line material.
The electronic formula speaker selector is
adopted and the golden cladding contact is used for a switching relay. Moreover,
the last one memory functionality in which after the power source off holds the
description of a selection is equipped.
The large-sized power meter
which can carry out the Direct reading of from 0.0001W to 300W is carried.
Furthermore, the bronze glass of 10mm thickness is used for a front.
VC-4 indicator which can check an operation of voltage control amplifier
and electric-current drive amplifier is carried.
DC / normal 2 way input
terminal is carried.
The outer-diameter phi7.4mm very-thick cable which
used 50 core oxygen-free-high-conductivity-copper line is adopted as the power
cable.
The oxygen-free-high-conductivity-copper pin code with a gilding
termination is attached.
|
.JPG) |
.JPG) |
| Form |
Stereo power amplifier |
| Output power (20Hz - 20kHz) |
240W+240W (4 ohms, 0.002%)
200W+200W (6
ohms, 0.001%)
170W+170W (8 ohms, 0.0007%) |
| Dynamic power (IHF) |
600W+600W(2ohms) /600W+600W (2ohm}60-degree
reactance load intensity)
400W+400W(4ohms) /400W+400W (4ohm}60-degree
reactance load intensity)
275W+275W(6ohms) /275W+275W (6ohm}60-degree
reactance load intensity)
225W+225W(8ohms) /225W+225W (8ohm}60-degree
reactance load intensity) |
| Distortion (-3dB) |
| 1kHz: |
Below a limit of measurement (0.0002%)
(6ohms)
Below a limit of measurement (0.0002%) (6ohm}60-degree reactance
load intensity)
Below a limit of measurement (0.0002%) (8ohms)
Below a
limit of measurement (0.0002%) (8ohm}60-degree reactance load intensity)
|
| 20Hz - 20kHz : |
0.0009% or less (6ohm/6ohm}60 degree)
0.0007% or less (8ohm/8ohm}60 degree)
|
|
| Frequency characteristic |
0.8Hz-150kHz+0 -3 dB
20Hz-20kHz+0 -0.1
dB |
| Output bandwidth |
5Hz - 100kHz (cpo-3dB, 0.01%, 8ohms)
|
| SN ratio |
120dB(IHF'66)
93dB(EIAJ)
|
| Remains noise voltage |
300 microvolts or less (Lin.)
50
microvolts or less (IHF-A) |
| Input sensitivity/impedance |
1.2V/47kohm |
| Dumping factor |
120 (8ohms) |
| Meter indicating range |
0.0001W-300W (8ohms)
- 60dB - +2dB
|
| Meter indication precision |
}3dB (-40dB or more)
}5dB (less than
-40dB) |
| Meter attack time |
100 microseconds |
| Recovery time |
300ms |
| Power consumption |
400W |
| Power source |
AC100V, 50/60Hz |
| Dimensions |
Width 476x height 209x depth of 475mm
|
| Weight |
33.7kg |
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