The Integrated Amplifier developed on the theme of
high-quality-izing and dynamic-range-izing of the amplifier itself.
dynamic power supply scheme and the non switching circuit were adopted, and the
high power which has a quality in an overall reflecting the thought of real
dynamism is realized.
Since it corresponds to extensive
dynamic-range-ization of the source and the speaker has been fully sounded also
with the time of the Dainyuu power, the dynamic power supply scheme has been
adopted as a power-source part.
It is the power circuit of this scheme consisting of two power supply sections,
a low-voltage part (VL) and a high-voltage part (VH), usually driving only
in a low-voltage part with signal level, and driving in a high-voltage
part at the time of better and the Dainyuu power,Thereby, a loss of an
output stage decreases sharply and makes high power possible.
Moreover, since a high-voltage part receives a signal wave form and it
always follows with a fixed voltage value, it does not set a wave-like deficit,
Furthermore, since it is the design of locking as long as a signal
continues while the high-voltage part had been locked when the Taishin number
repeats in a wide area, the wave-like deficit by being late has also been
And the transformer had little magnetic flux leakage, the
large-sized toroidal transformer characterized by a high regulation was adopted, and the electrolytic capacitor put into practice carrying eight and considering
it as the large capacity of total 176,000micro F etc., and has realized
low-impedance-ization. Moreover, nonmagnetic-ization, such as using copper lead
wire and an oxygen-free-high-conductivity-copper line for the part of a
power-source part, was put into practice, and a harmful magnetic distortion is
The non switching circuit which has the established reputation
which realized switching distorted zero in a power part is carried.
of the original high speed bias servo circuitry of Pioneer, a bias current is
controlled according to an input signal, and this is pressing down the dirt of
the music by switching distortion fundamentally by the scheme which always
maintains a transistor at operating state.
The FET buffer circuitry was
adopted between the voltage amplification part and the power amplification part,
the voltage amplification part and the power amplification part were separated
completely, and the nakedness property before applying NFB is improved sharply.
Even if the input impedance of FET is infinitely near and the property
top power amplification part receives a load-impedance variation,Since
it does not appear in the influence's input side, and also an operation
of a voltage amplification part is stabilized and it can drive by a low-power-output
impedance in a power amplification part (constant-voltage drive),Suppress
the distorted occurrence by the nonlinearity of a power amplification part,
and the influence of the reaction signal from a speaker is eliminated,
and also much more low-distortion-ization of a power part is realized.
amplifier considers from an input to an output as a push pull stream
composition, and also makes the input the parallel push pull by super-low-noise
FET. Moreover, consideration that the feeding back point of DC servo is made
into the 2nd step of bias power-source part instead of the first rank, and a
servo circuitry does not affect an SN ratio is taken.
As a result, the SN
ratio was set to 74dB and has realized the outstanding property for which it
presses only in the 76dB grip which is the theoretical threshold value by
thermal noise, such as a transistor in this circuit system.
circuitry is adopted as each of MC head amplifier, an equalizer amplifier, and
This removed all the coupling capacitors from MC input to
the speaker output, whole page non coupling-capacitor-ization is attained, and
while losing the care about coloring of the sound resulting from a capacitor
etc., the high-resolution tone quality is realized.
The line straight
switchpoint which links an equalizer amplifier and power amplifier directly and
with which a tone quality with a high purity is obtained is carried.
control, the mode, and a balance volume are passed and a signal path is made
The nonmagnetic part is adopted, in order to suppress a magnetic
distortion which has an ill effect on a tone quality and to obtain a tone
quality with a higher purity.
Copper lead wire is altogether adopted as the
semiconductor used for each amplification stage, and copper is used also for the
lead line cap of main resistors, such as an emitter resistor.
copper is used for the lead wire of main capacitors, and the
oxygen-free-high-conductivity-copper line is used for main product-line
The copper plating was given to the chassis and also the
resonance of a frame is prevented as an H type structure.
cross interferencee is prevented by intercepting separations of Lch of power
amplifier, an independency of Rch, the Taishin number system, and a small signal
system, equalizer amplifiers, and all the MC head amplifier on a structure.
The very-thick power cord of a double insulation structure is adopted as
a power cord.
Furthermore, paying attention to sound changing with the
polarities of AC line, the thorough mandatory of the polarity of how to roll a
transformer or a power cord is carried out.
||200W+200W (20Hz - 20kHz, both channel drive, 8ohm)
|THD (20Hz - 20kHz)
||0.002% (at the time of an effective output)
|Cross modulation distortion (50Hz:7kHz=4:1)
||0.002% (at the time of an effective output)
||5Hz - 65kHz (IHF, both channel drive, THD0.01%)
||Speaker(4ohm-16ohm): A, B, A+B
||140 (20Hz - 20kHz, 8ohm)
||Phono man month: 2.5mV / 50kohm
MC: 0.15mV/100ohm, 33ohm, 8ohm
Tuner, AUX, Tape Play1, 2:150mV / 50kohm
|Phono maximum permissible input (1kHz,
||Phono man month: 20Hz-100kHz}0.2dB
Tuner, AUX, and Tape Play:1Hz-200kHz+0 -3 dB
(IHF, A network, a short
AUX, Tape Play: 115dB
||Bass: }6dB (100Hz)
Treble: }6dB (10kHz)
||Low: 15Hz, 6 dB/oct.
|Power consumption (Electrical Appliance and
Material Control Law)
||Width 420x height 150x depth of 420mm