||65,000yen(around the 1989 time)
The Integrated Amplifier developed at last the
newest digital source studied in addition to the traditional amplifier
technology of a Marantz.
In addition to a large-sized power transformer,
the special edition electrolytic capacitor of 18,000 micro Fx2 is adopted as a
Moreover, the OFC line of a very thick is adopted as a
speaker circuitry or a power cord.
In order to stop the rectification
noise generated when changing an alternating current into a direct current, the
noise-killer circuitry is carried.
The RF noise near 1MHz is intercepted
from several 100kHz, and reservation of the tone quality without muddiness is
Furthermore, it has succeeded in increasing a low-pass feeling of
power by lowering the primary side circuit impedance of a power source.
Moreover, the noise is thoroughly eliminated by leading about and the
careful circuitry of a product line.
A power stage is the stream
composition which made the power transistor of Pc-100W which was rich in the
linearity the parallel push pull, and is raising the gain as a three-step
Moreover, the copper shielding board was mounted on
the power transistor, the radiation from a transistor and an oscillation were
suppressed, and the influence on a very small signal is eliminated thoroughly.
The phone equalizer constitutes low-noise amplifier with the combination
of low-noise FET and IC for audios.
Moreover, by attenuating super-low-pass one of 30Hz or less, modulation
by low frequency was prevented and the still wider dynamic range has been
What was selected carefully is used for a part and the high-quality sound
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 substrate
excellent in vibration suppression nature is used for the printed circuit board.
When a "first class" and large power are required at the time
of the Koide power, "the Class-A / AB class circuit changing switch"
which can perform proper use of "Class AB" are equipped.
In order to avoid the influence on the
signal current, the circuitry arranged near the power-source block of a voltage
change circuitry is adopted. Moreover, for a bias change, shortest-ization of
distance is attained using remote control by a photo-coupler, and the influence
on a tone quality is suppressed to the minimum.
switchpoint into which the conventional direct switchpoint was developed further
All of switchpoints and tone control circuits, such as not the
defeet of a tone control but a tapes monitor and a processor, are jumped, and it
is direct inputted into power amplifier through an exclusive volume.
Five input terminals and three tapes input/output terminals are carried.
Moreover, it is also possible to also carry the processor termination and to
connect a graphic equalizer etc.
||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