|49,800yen(around the 1982 time)
The stereo Integrated Amplifier which carries the power amplifier unreturned [
of 0dB ], and a super equalizer.
The direct distortion servo circuit has
realized the non-feedback system.
This servo circuit compares the signal
(main signal + distorted ingredient) and incoming signal which are acquired from
the output side, detects only a distorted ingredient, carries out phase
inversion of this distorted ingredient, and adds it to an input side. Thereby,
static distortion is reduced to the domain of theory top zero.
In this non-feedback system, in order not to return an output signal to
an input side like a negative return (NFB) system, dynamic distortion did
not occur but the features, like "simple-ized" "high-speed-izing"
of the circuit can be carried out have been acquired, without being influenced
by the back electromotive force of a speaker.
In order to correspond also to the speaker
of low impedance, the power-source part and the electric power magnification
stage are strengthened so that he may feel easy even about a 4-ohm speaker and a
full power play can be performed.
The first rank uses circuit composition of a power amplifier part as a
2 steps of differential current mirror with a low noise transistor, and
it attains low impedance-ization and it is making it separate it completely
with an electric power amplifier by the complimentary emitter-follower.
The electric power magnification stage has push
pull composition of a high-speed power transistor, and is attaining high
The filter which cuts a harmful super-low-pass noise is built
in the input unit of this power amplifier.
In order to correspond to
wide-range-ization of a cartridge or power amplifier, the super equalizer is
developed and carried, and the frequency response of 100kHz is realized.
first rank considers it as the differential amplification by low noise dual FET, and the following stage consists of an op amplifier and a CR form equalizing
filter, and consists of direct-current servo systems.
In order to
demonstrate the engine performance of MC cartridge, while removing the input
capacitor which influences sound quality greatly from MC input terminal, it is
considered as a perfect Capacitor-Less to Rec out, and also high gain-ization is
Tone control, loudness control, and a Rec out selector
The high-speed protection circuit is carried.
|<Power amplifier part>
||Unreturned [ of 0dB ] power amplifier system
(both channel drive, a sine wave continuation output)
|60W+60W (4ohm-8ohm, 20Hz - 20kHz)
||Tuner, Tape, Aux:150mV/47kohm
|THD (20Hz - 20kHz, Output-power-3dB o'clock)
||0.009% or less
|Cross modulation distortion (60Hz:7kHz=4:1)
||0.005% or less (at the time of an
Output-power equivalent amplitude output)
||Below a measurement limit
|Output bandwidth (IHF, both ch(es) drive,
||5Hz - 80kHz
|Frequency response (at the time of 1W
||4Hz-150kHz+0 -3 dB
|Output load impedance (1kHz)
||Speaker AorB: 4ohms - 16ohms
Headphone: 230mW/eight ohms
||The super equalizer system by direct-current
||Phono MM: 2.5mV/47kohm
|The maximum except take-off/Output power
|RIAA deflection (MC/MM)
||0.002% or less (at the time of 1kHz and 8V
|Signal to noise ratio (IHF-A, input short
Aux, Tape: 106dB
||Bass: ±8dB (100Hz)
Treble: ±8dB (10kHz)
||Low-pass: +7dB (100Hz)
High region: +6dB
(Electrical Appliance and Material Control Law)
||Width 434x height 112x depth of 390mm