|135,000yen(September, 1981 release)
The Integrated Amplifier which carries a DUObeta
circuit / S.
A DUObeta circuit / S is adopted as a power part, and it
has become a description almost equivalent to L-530 in circuitry.
of the power part was made into the parallel connection of high gm and low-noise
FET, after giving the large current and obtaining all required gain, the
predrive stage was banished, and also "proper-quantity NFB" and "DC servo" were
prepared, and the tone quality is finished.
A Class-A operation area is
expanded to 8W, and most usual listening level is covered with a Class-A
Moreover, by AB class, the maximum output 100W is realized and it
corresponds also to the Taishin number input which starts rapidly.
stage adopts R.E.T. and is taken as parallel P.P.
an equalizer part
changes an open loop gain -- the object for MC, and the object for man month --
a proper quantity of NFB cars are determined as each, and it has composition
which can be said also as two exclusive equalizers.
High gm and low-noise
FET developed in MC head amplifier are adopted as an input by the parallel
differential amplification, and not only an SN ratio but distortion, a tone
quality, etc. are raising completeness all fields.
With a switchpoint,
the phone straight functionality which changes to a disk first priority is
Product-line leading about to contacts, such as a selector, a light
filter, a balance control, etc. is separated, and a pure disk play is possible.
A tone control fraction is selectable about six points at each the object
for high regions, and for low-pass. It can ask for a favorite tone quality.
Moreover, since it was not considered as the
independent amplifier circuitry but the NFB circuitry of a power part is used,
neither a noise occurrence nor a failure of a tone quality is caused.
The large-sized transformer of capacity 300VA and the block capacitor of
15,000 micro Fx2 are adopted as a power-source part.
Moreover, the thing
equivalent to L-530 is adopted as the heat sink of the Skype fin.
warmup indicator is carried, time and a temperature are detected as a warmup
being completed, an indicator goes out, and it can check having gone into the
status that it was stabilized also in respect of the tone quality.
recording switchpoint is carried, and if a switchpoint is pushed, it can record
with two tape decks.
Usually, Rec Out is separated and a tone-quality
failure is not caused.
|Effective output (both channel operation)
||Class-A area: 8W+8W (8ohms)
maxima: 100W+100W (8ohms)
||0.007% or less (8 ohms, both channel operation, 8W)
Phono MC: 125 microvolts
Tuner, AUX, Monitor, Main In: 310mV
||Phono man month: 100kohm, 50kohm,
Phono MC: 300 ohms, 100ohm, 40ohm
Tuner, AUX, Monitor:40kohm
Main In: 47kohm
|SN ratio (IHF-A)
Phono MC: 67dB
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