|480,000 yen(April, 1986 release)
The stereo preamplifier which inherits the flow of C-280.
Sound quality is
transparent strictly and is thinking the textures of an original sound place as
the base before considering circuit composition as whole page
dregs cord Class-A push pull composition and giving NFB -- the characteristic is
Dregs coding for retrieval operates a two-piece column as one
element combining a magnification element, made input impedance high, and it has
improved the high region characteristic sharply at the same time it enlarges a
Moreover, linearity is maintained to the operating limits of an
element, distortion decreases, and the signal to noise ratio is also improved.
direct-current servo system is adopted as all the unit amplifier.
direct current generated in the output is detected and it returns to an input, and it works so that an output may keep zero potential right.
with high quality where all the signal systems are linked directly from an
analog disc (AD) input to an output and which does not have coloring by this has
The power transformer only for a right-and-left channel
is carried, and it is further supplied by the winding wire only for [ each ]
Although the multiple power supply system which lets the
constant-voltage power source only for [ each ] unit amplifier pass is adopted
and the commutator and the filter condenser are placed near the transformer, in
order to consider it as a pure and powerful power source,It has succeeded in a
constant-voltage power supply circuit keeping power-source impedance low over a
broadband by being stored in housing with unit amplifier.
straight signal course is constituted at the shortest, a change installs a relay
in the place of a required signal course, and is changing by controlling these
relays electronically in a logic circuit.
The encapsulated type relay
developed as an object for audios is adopted especially as a relay. A contact is
a crossbar twin system and has become low contact resistance and a thing of high
durability which has high quality.
With equalizer amplifier, since the
signal level to deal with is weak and it is easy to be influenced by peculiar
noise, especially FET of an input is choosing and using the low noise element.
Moreover, especially the condenser has adopted the non-guided type by a
compound dielectric developed as an object for the audios focused on sound
quality. Since it did not guide, it excels in the characteristic besides an
audio frequency band, and also it is filled up with an epoxy resin, prevention
of self-vibration generated with signal voltage is also given, and it is.
The metallic foil super-precision type is used for return resistance. There
is almost no change of the resistance by temperature with accuracy, and a stable
reproduction sound can be expected.
The amplifier of six right and left
containing balance amplifier is stored by thick aluminum housing with the
exclusive constant-voltage power supply circuit.
It was firmly fixed with
the screw and the base has also prevented vibration with the shield effect of
the prevention from guidance.
The tape monitoring function which became
independent with the input-and-output terminal only for [ of two lines ] a tape
recorder. The tape copy switch which dubs possible between two more tape
recorders is formed.
Three step type Attenuator which can leave volume
control as it is and can lower volume in an instant is prepared.
and -infinity (silent) can be chosen.
The jack which performed rhodium
plating is used for an input-and-output jack, and the outstanding durability has
Low-pass and the high region which run short at the time of small volume
are raised, and energy balance is taken,The Compensation which controls
the amount of rises automatically with the position of volume control,Functions,
such as a headphone jack for the Subsonic Filter which cuts the unnecessary
low-pitched sound noise besides an audio frequency band, the mode switch
which uses a monophonic and checks the balance of a speaker etc., and a
monitor, are carried.
The natural persimmon board is
attached to the side at the panel finish of the gold tone scratch hair line.
|Tuner, CD, Line, Tape Play Input :
||1.0Hz - 500000Hz, and +0 -3.0 dB
20000Hz, and +0 -0.2 dB
||20Hz - 20000Hz, and +0 -0.2 dB
||0.005% (with all the input terminals)
|Input sensitivity/input impedance
Output power / EIA output 0.5V)
Line, and Tape Play:126mV/31.5mV/20kohm
CD Balanced: 126mV/31.5mV/40kohm
|An Output power/Output load impedance
||Output(Balanced): 2.0V/50 ohm (25ohm/25ohm)
Output(Unbalanced): 2.0V/1 ohm (phono jack)
126mV/200 ohms (at the time of AD)
||Conformity impedance: 4ohms - 100ohms
|S/N / input conversion noise
||Input short-circuit, A-compensation
Tuner, CD, Line, Tape Play:110dB /, -128dBV
Tuner, CD, Line, Tape Play:
a distortion, 20Hz - 20kHz)
Tape Rec: At the time of 19.0 V/AD
|the maximum inlet pressure (1kHz, 0.005% of
|Minimum load impedance
||Output (Balanced): 600ohms (300ohm/300ohm)
Tape Rec: 10kohm
||Tuner, CD, Line, Tape Play->Output:24dB
Tuner, CD, Line, Tape Play->Rec Output:0db
AD->Rec Output: 36dB
2: +8dB (100Hz), +6dB
||10Hz, -18 dB/oct
||- 20dB-30dB, -infinity
|The semiconductor used
||108Tr, 15FET, 27IC, 106Di
||100V, 117V, 220V, 240V, 50/60Hz
||the width 470x height (piece -- it
includeds) 145x depth of 373mm