|82,000yen(around the 1985 time)
The Integrated Amplifier developed as a try angle
drive system aiming at the play of rich musicality employing efficiently the
property which was excellent in the digital source.
The figure of the
ideal of amplifier is pursued and the review is aimed at from the power-source
First, a large-sized power transformer is carried in Lch and the
object for Rch of a power amplifier part, respectively, and power is supplied to
each output stage and the voltage amplification stage.
Furthermore, a 16,400-micro F large capacity power supply capacitor is
adopted per single-sided channel. Moreover, 2 parallel connection of the
power transistor per single-sided channel is carried out, and the thorough
power part is strengthened, such as considering it as a parallel push pull.
Moreover, not only a power
transformer but the construction itself adopts a monophonic stream composition, and a power amplifier part puts its heart and soul into the monophonic stream
composition until it begins a power transformer, and a rectifier circuit and a
power source capacitor and results in each part article, a product line, and the
layout of a radiator. Thereby, the cross interferencee was suppressed and the
high separation is attained.
The line straight circuitry which jumps a
tone control is adopted.
The non switching circuit TypeII which improved
the non switching circuit further is carried.
The instant stabilization of
the idle current was carried out, and thermal distortion is proposed sharply.
Moreover, the nonlinear distortion of an output stage is also improving to
1/30 by detecting and rectifying the difference of an input signal and an output
MC head amplifier is carried.
What was selected
carefully to each parts was used, the capacitor and the resistor were begun, and
the oxygen-free-high-conductivity-copper line is adopted as main product-line
material and a very-thick power cord.
Moreover, it has pierced through the
thought of a tone-quality first priority, such as dividing a grounding point
into a power supply system and a signal system.
Furthermore, the large-sized
vice type which can perform a stable current supply source is adopted as a
speaker terminal, and the tinning treatment nonmagnetic also in each pin jack is
It has five input terminals and two tapes terminations.
Especially compact-disk position serves as a design in which the high purity
source, such as also considering a circuitry top as the shortest product line as
a main source, is employed efficiently.
The sub- wood of the photograph
was an option.
||Non switching Integrated Amplifier
|20Hz - 20kHz :
||120W+120W (6 ohm, both channel drive)
100W+100W (8 ohm, both channel drive)
||160W+160W (4 ohm, both channel drive)
130W+130W (6 ohm, both channel drive)
110W+110W (8 ohm, both channel drive)
|THD (20Hz - 20kHz)
||0.003% (at the time of an effective output)
|Cross modulation distortion (50Hz:7kHz=4:1)
||0.003% (20Hz - 20kHz, 100W, 8ohm)
||5Hz - 55kHz (IHF, both channel drive, THD0.01%)
||Speaker(4ohm-16ohm): A, B, A+B
||100 (20Hz - 20kHz, 8ohm)
||Phono man month: 2.5mV / 50kohm
MC: 0.2mV/100 ohms
compact disk, Tuner, AUX, Tape Play1, 2:150mV / 30kohm
|Phono maximum permissible input (1kHz,
||Phono man month: 20Hz-20kHz}0.2dB
compact disk, Tuner, AUX, and Tape Play:2Hz-100kHz+0 -3 dB
(IHF, A network, a short
disk, Tuner, AUX, Tape Play: 110dB
||Bass: }8dB (100Hz)
Treble: }8dB (10kHz)
||Low: 15Hz, 6 dB/oct.
|Power consumption (Electrical Appliance and
Material Control Law)
||Width 420x height 151x depth of 427mm
||Sub- wood JA-A120 (4,000yen)