||60,000yen(around the 1989 time)
The Integrated Amplifier which adopted the Class-A /
AB class change scheme.
In addition to a large-sized power transformer,
the special edition electrolytic capacitor of 18,000 micro Fx2 is adopted as a
power-source part, and the electric current stabilized also in the time of the
Oide power is supplied.
Moreover, the OFC line of a very thick is adopted as
a speaker circuitry, and the powering to the power transistor is performed
The powerful noise-killer circuitry is carried.
rectification noise produced when changing an alternating current into a direct
current. Since this RF noise near 1MHz has an ill effect on a tone quality also
in a slight quantity from 100kHz, this RF has been cut by the noise-killer
Furthermore, the noise is thoroughly eliminated by the circuitry
of separating a rectifier circuit from a signal system.
transistor has adopted the parallel push pull stream composition by the power
transistor of Pc-100W excellent in the linearity, and is raising the gain as a
three-step Darlington connection.
Moreover, the heat sink is suppressing the
cross interferencee in the output circuit as a right-and-left independent
structure, and, thereby, the crosstalk is decreasing.
Low-noise FET is
adopted as a phone equalizer, combination with IC for audios constitutes
low-noise amplifier, and the purity of the phone signal with low level is
Moreover, the modulation by low frequency is prevented by
carrying out the roll off of the 30Hz or less.
The material selected
carefully is used for a part.
The electrolytic capacitor which uses for a separator the paper with which
the fiber type protein fibroin and Manila hemp of silk were mixed is adopted
especially as a signal system.
Moreover, the paper polyesters base
material excellent in vibration suppression nature is used for the printed
circuit board, muddiness was suppressed and the highly transparent tone quality
A Class-A / AB class circuit changing switch is prepared, and it has the stream composition which can enjoy the tone quality of a Class-A.
Usually, it is a Class-A, and when large power is required, change operation
of being AB class is possible.
The circuitry which arranged the voltage
change circuitry near the power stage, and a bias change are suppressing the
influence on a tone quality, such as attaining shortest-ization of the distance
by a photo-coupler, to the minimum.
With a Source-Direct switchpoint, all of switchpoints and control circuits, such as a tapes monitor and a
processor, are jumped, and the direct input to power amplifier is possible
through an exclusive volume.
Five input terminals are carried and the
tapes input/output terminal carries three lines.
Furthermore, it is also
possible to also carry the processor termination and to connect a graphic
||Stereo Integrated Amplifier
|Output power (20Hz - 20kHz, both channel simultaneous drive)
|Class AB :
|Class A :
|Class AB :
|THD (1kHz, 8-ohm load intensity)
|Cross modulation distortion (SMPTE)
|Output bandwidth (an 8-ohm load intensity,
||10Hz - 50kHz
||compact disk and a Source Direct:
10Hz-100kHz+0 -3 dB
||180 (an 8-ohm load intensity, 20Hz - 10kHz)
||Phono MC: 250 microvolts/100 ohms
man month: 2.5mV/47kohm
High SFT Level: 150mV/33kohm
|Phono maximum permissible input (1kHz)
|RIAA deflection (20Hz - 20kHz)
|SN ratio (A network)
||Bass: 100Hz, ±6dB
Treble: 10kHz, ±6dB
||220W (Electrical Appliance and Material
||Width 454x height 165x depth of 380mm