|165,000yen(October, 1981 release)
The Integrated Amplifier which carries a DUObeta
circuit / S.
The DUObeta circuit / S which banished the predrive stage
of the power amplifier circuitry are adopted.
The differential cascode
received low-noise FET and the parallel push pull input, it connected to the
output unit by the parallel push pull of R.E.T. (ring emitter transistor), and
the amplifier circuitry which was excellent in nakedness properties including an
SN ratio or a distortion is realized.
The Class-A operation area is
expanded to 15W by acting to a power part output stage as parallel push pull
usage of R.E.T. of a fast-switching property etc., and AB class maximum output
has realized 120 W/ch.
Moreover, the Skype fin type heat sink with the high
heat-dissipation effect is adopted as a heat sink.
The open loop gain
switching type is adopted as an equalizer.
The usual high gain equalizer changes the amount of NFB, changes gain,
to supporting MC/man month both cartridges, by L-530, sets a proper quantity
of the amounts of NFB as each, and is changing gain by modification of
open loop gain.
straight functionality which has priority over other special-NetWare-program
sources, and changes to a disk play is carried.
It is possible to use a
simple circuitry by jumping to a selector, a light filter, and a balance
control, and separating unnecessary product-line leading about.
The tone control fraction can set the turnover frequency of six points
as each the object for high regions, and for low-pass.
Moreover, tone control
without the noise occurrence and tone-quality transition at the time of tone in
is made possible by considering it as the functionality using the NFB circuitry
of the power part not using an independent amplifier circuitry.
capacitor (the large-sized transformer of capacity 320VA and 30,000 micro F) is
adopted as a power-source part, and it is considered as the design which gave
The warmup indicator is carried, a definite period of time passes after
an application of power, and if it goes into the status that it was stabilized
also in respect of the tone quality, an indicator will go out.
The improvement in a tone quality is more possible by carrying the line
phase sensor, being able to detect the polarity of a domestic AC power source, and unifying a polarity.
|Effective output (both channel operation)
||Class-A area: 15W+15W (8ohms)
maxima: 120W+120W (8ohms)
||0.007% or less (8 ohms, both channel operation, 15W)
Phono MC: 125 microvolts
Tuner, AUX, Monitor, Main In: 340mV
||Phono man month: 100kohm, 50kohm,
Phono MC: 300 ohms, 100ohm, 40ohm
Tuner, AUX, Monitor:40kohm
Main In: 47kohm
|SN ratio (IHF-A)
Phono MC: 70dB
Tuner, AUX, Monitor, Main In: 110dB
||10Hz - -100kHz one dB
||Low-pass turnover: 77Hz, 120Hz, 200Hz,
330Hz, 550Hz, 880Hz
High region turnover: 880Hz, 1.5kHz, 2.5kHz, 4kHz,
The maximum variation: ±8dB
||Two lines (Tape1, 2)
||Two lines (1->2, 2->1)
||Subsonic speed: 15Hz
A high cut: 9kHz
||Width 453x height 161x depth of 444mm