|49,800yen(around the 1981 time)
Integrated amplifier of new class A scheme adoption
which carries a linear feedback circuit.
Theoretical value distortion =
the linear feedback circuit which realized zero is carried. This circuitry forms
an independent feedback circuit which enables an amplification infinite in a NFB
loop, and has realized theoretically amplifier which is called the speaker drive
without the influence of pure gain and counter-electromotive force without the
influence of theoretical value distorted =0, an element, or a power source, or a
wire rod and which performs an ideal operation.
Switching distortion is
canceled by the synchro bias circuit original with technics.
order to acquire a high efficiency ratio, the output stage was always maintained
at the active state by supplying a fixed bias to + side - side each output
transistor which stops by turns in B class and AB class operation synchronizing
with a pause cycle, and the switching distortion resulting from the pause of an
output stage is canceled.
Furthermore, in order to make the signal path and
the bias-current path become independent, the output stage could save the always
suitable operating point, and crossover distortion has also canceled conjointly
work of high-speed response diode with ideal square-law characteristics.
The concentrated power block which lost the influence of an
electromagnetic radiation as a matter of fact is adopted.
An output stage
and a power-source part are unified by this block, and the distortion of the
high region by electromagnetic waves is suppressed on the relative-minimum
It is the circuit design which employed the effect of the linear
feedback circuit also in the tone control circuit efficiently.
defeet switchpoint is also formed although the tone control is considering it as
the middle point defeet.
Many properties, such as a crosstalk and an SN
ratio, are raised by adopting as each selector switch of Input and Rec out the
remote action switchpoint which abandoned unnecessary leading about of a code.
The protection network of a pure electronic formula is carried.
The high light filter and the Subsonic Filter are carried.
|<Tuner, the Aux->SP out
|Effective output (20Hz - 20kHz)
||40W+40W (8 ohms, 0.007%)
||0.007% (Output-power-3dB, 20Hz - 20kHz)
|Output bandwidth (THD 0.02%)
||5Hz - 40kHz (8ohms)
|Dumping factor (8ohms)
||main or remote: 8ohms - 16ohms
||Phono man month: 2.5mV / 47kohm
Aux, Tape:150mV /, 22kohm
|Phono frequency characteristic
||20Hz - 20kHz, RIAA}0.8dB
||20Hz-20kHz+0 -0.2 dB
2Hz-100kHz+0 -3 dB
|SN ratio (IHF-A)
Tuner, Aux, Tape: 100dB
||Bass: }10dB (50Hz)
Treble: }10dB (20kHz)
||30Hz-6dB / oct
|A high filter
||7kHz-6dB / oct
||+ 9dB (50Hz, Volume-30dB)
||Width 430x height 97x depth of 310mm