|200,000 yen(September, 1977 release)
Amplifier which rendered the limitation extravagant as a highest-class control
center, and was developed.
From the input of an equalizer to the last
output stage, symmetrical type Class A push pull drive circuit is adopted as all
the magnification stages also including filter amplifier and headphone amplifier. the base before a push pull circuit gives NFB -- since the
characteristic is excellent, the total characteristic excellent in a little
NFB(s) can be acquired.
The ring emitter transistor (RET) newly
developed as an object for high frequency electric power magnification is used
for the output stage of the equalizer by Class A push pull.
This RET has
structure which carried out 100-piece parallel rigidity of the transistor unit
for small signals through ballast resistance of the emitter by a diffusion
layer. Electric power magnification is enabled maintaining the outstanding high
frequency characteristic with which the transistor for small signals is equipped
Furthermore, by sending big current, the Output load impedance was
lowered, by this, low impedance-ization of the NFB loop was enabled and SN is
The DISC level Attenuator which can carry out 10dB
continuation variable is carried.
Moreover, the input impedance of DISC1 can
be changed to three steps.
Sound quality of each part and examination of
noise were performed strictly, and it has adopted with more than enough margin
simultaneously with a torture test also about long-term stability.
Low-pass and a high region carry the tone control with two steps of
changing points, and can adjust a step type with the rotary switch of 11
Moreover, the tone switch which can turn on and off a tone so that
the flat characteristic can be acquired is carried.
The Attenuator which
is -20dB so that muting can be performed is carried.
The exclusive amplifier of pure complimentary direct connection is formed in headphone amplifier.
It is designed prepare three tape input and output, among
these carry out mutual dubbing of the two sets.
Moreover, dubbing between
tape recorders in the state where made Koppies Izzi become independent, and it
became independent hearing other program sauce is possible.
enhancement circuit which adjusts presence minutely is carried, and massive
compensation is possible.
There is an exclusive relay box as an option
and a speaker system can be changed with the speaker changeover switch in the
Moreover, there was an option case of walnut finishing.
||Stereo control center
||High-level input: 20Hz - 20000Hz, and +0
DISC input: 20Hz - 20000Hz, ±0.2dB
||0.01% (by 20Hz - 20kHz, and Output power)
|Input sensitivity/input impedance
||DISC1:2-6mV/30kohm, 47kohm, 100kohm
AUX1, 2, Front, Tape Play1, 2, Front:200mV/47kohm
|An Output power/Output load impedance
||Main Output: 2.0V/200 ohm (at the time of
Volume maximum and the rated input)
Tape Rec Output1, 2, Front: 200mV/200
||More than 10V (distortion 0.01%, 20Hz -
|The disc maximum input
||400mV - 1.2Vrms (1kHz, 0.01% of distortion)
* 400mV is the DISC level-control maximum (equalizer gain 40dB).
is the DISC level-control minimum (equalizer gain 30dB).
|Minimum load impedance
Tape Rec: 10.0kohm
||Tuner, AUX, and a Tape Play input
DISC1, 2, and a Media Interface
||Tape Rec Output:
DISC1 and 2 can be adjusted to
level regulation and -10dB.
||Tape Rec Output:
|S/N / input conversion noise
input, IHF-A, input short-circuit)
|High-level input: 106dB / -120dBV
Media Interface Connector:81dB /, -135dBV
|Volume control linkage error
||Less than 1dB
2dB each step
||Changing point 400Hz :
|High region :
||Changing point 2.5kHz :
|DISC low enhancement (massive compensation
||They are 0dB, +0.5dB, and +1dB (100Hz) to
the RIAA standard characteristic.
|Compensation (volume control-30dB)
||50Hz, 250Hz : +9dB
||Subsonic Filter: 17Hz, 18 dB/oct
filter: 8kHz, 12 dB/oct
||Output load impedance: 0.3ohm
(8ohm load): 0.8W (1kHz, 0.03% of distortion)
|The semiconductor used
||Transistor: 99 pieces
FET: Eight pieces
Diode: 28 pieces
|a Dimensions (a piece -- it includeds)
||Width 445x height 160x depth of 355mm
||Relay box R-1 (12,000yen)
Wood case A-2 (15,000yen)