Stereo power amplifier which supplied unstintingly the technology which
Pioneer can have and was completed in order to correspond to the digital source.
The power-source part has adopted the electrolytic capacitor which
amounts to total 48,000micro F while it has prevented the cross interferencee by
dissociating thoroughly and uses a large-sized transformer by right-and-left
Moreover, the large-current supply capacity 47A is attained very much,
such as using independently the bridge rectifier circuit by high speed
low-noise diode for the each on either side positive and negative side.
4 parallel push pull stream composition of Pc=130W type is adopted
as a power transistor.
Apart from the normal input terminal from control
amplifier, compact-disk direct input terminal which links a compact disk player
and power amplifier directly is carried. Moreover, the Line direct termination
is also carried and those without こ are possible using the compact-disk direct
termination said appearance.
It is also possible to have equipped this
compact disk/Line direct termination also with the output-terminal for exclusive
use, and to carry out a return to control amplifier.
In order to shorten
a signal path if possible, a rear-panel side arranges the volume itself to the
nearness of an input terminal, and it enables it to control it from a front
through the remote shaft made from aluminum.
carries the non switching circuit TypeII to which the polish was applied further
in the non switching circuit which is not generated theoretically, expands the area of switching distorted zero more, and is attaining much more wide
Moreover, immediately after power-switch ON and at the time of
the Taishin number input, the idle current which is carrying out the drift
continuously by transition of outside temperature etc. is stabilized, and the
occurrence of the thermal distortion resulting from this is suppressed.
Furthermore, the difference of an input signal and an output signal is
detected and rectified, and the nonlinear distortion of an output stage is
suppressed to 1/30 or less.
While reducing a magnetic distortion, in
order to raise the amount of periodic damping by pasting of a different metals,
the copper plating chassis is adopted.
Moreover, the copper plating screw is
adopted also as a screw.
In addition to the insulator as four feet, the
five-point type of mounting which also equipped the center of the main unit with
the insulator is adopted. It has a structure which a heavy transformer supports
firmly by this also at the hub.
In the large-sized size of 39mm x 98mm,
the right-and-left independent indicator which displays an output skillfully is
carried, and the Direct reading of the output transition from 2mW to 300W can be
carried out without a change.
Moreover, in order to make peek power easy to
read, the peek hold facility for 0.6 seconds is built in.
An indicator can
also be turned off by a switchpoint.
Parts are selected carefully and
used in order to realize higher quality.
The reliable oxygen-free-high-conductivity-copper line is adopted as product-line
material. Moreover, the brass cap carbon resistor which suppresses a distorted
occurrence, the oxygen-free-high-conductivity-copper line AC code to which
the 70-micrometer Copper-foil substrate, resin case capacitor, gilding
input pin-jack, large-sized terminal, and polarity window which reduces
direct current resistance and an inductance was attached, etc. are adopted.
The output circuit
changing switch of 4ohm/8ohm is carried.
||Stereo power amplifier
(20Hz - 20kHz, both channel) drive)
|THD (20Hz - 20kHz)
||0.003% (at the time of 8 ohm and an Output power)
|Cross modulation distortion (50Hz:7kHz=4:1)
||0.002% (20Hz - 20kHz, 200W, 8ohm)
||Control Amp In, compact disk Direct, Line,
||compact disk/Line Direct Out, Speaker A, B,
||20Hz-20kHz+0 -0.1 dB
||125dB (IHF, a short circuit and A network)
||Width 457x height 154x depth of 430mm