In the inside of the certain requirements of
"Integrated Amplifier in the technician of PioneerThe highest-class Integrated
Amplifier which continued warming the idea ", six years supposing it expressed
our will to the maximum extent, adopted the circuit design simple for "a
straight sound", and also incorporated all the technologies that it can have,
such as thought, technologies, etc., such as Exclusive C7, and was born.
The symmetrical twin monophonic structure is adopted.
Focusing on a
central power-source part, the shielding TAP box which summarized input block of
a small signal system right and left in the power block and the center of back
of a large-current circuitry has been arranged, and the separation which was
excellent with the symmetrical structure which considered the right-and-left
channel circuitry as the independent stream composition is gained.
it equalizes to environments, such as a temperature in the main unit which
influences the length of right-and-left signal path length, or not only the
stream composition of parts but an operation of an element or a circuitry, a
magnetic-field distribution, an oscillation, and the occurrence of the electric
and mechanical property error on either side is also held down.
merit of the balance which linked two amplifier directly and was excellent, and
the Integrated Amplifier from which compactness is obtained is as it is,In order
to attain the purpose of the separate amplifier of operating the circuitry where
the roles of a voltage amplification and current amplification differ proper,
respectively, the pre power isolated rate structure is adopted.
preamplifier circuitry (from an input terminal to the voltage amplification
stage) is shielded for a volume with a nonmagnetic aluminum TAP box,Furthermore,
this TAP box has adopted the floating structure supported with a chassis through
vibration suppression rubber, the power-source part also considered the pre part
and the power part as the independent stream composition from the rectifier
circuit, and thorough separation-ization is realized.
Also electrically and
physically an isolated rate is formed so that a delicate input signal may not
cause the tone-quality failure by the circuitry interference from a power part, a variation of a power-source part, and oscillation by this, and it has a
structure which can also be called the separate amplifier in a set.
The advanced direct construction into which the direct construction which shortens a
signal path as much as possible was developed further is carried.
changeover relay and the volume unit were controlled from the front panel just
behind the input terminal, and input block is arranged back. Furthermore, much
more shortest-ization is realized by having arranged 16 power transistors of a
power block back collectively.
From input block, a signal is direct led to
power amplifier, and batch processing is carried out in amplifier back, and it
has attained large shortening of the path between Puri Power who became a noise
source easily, and between power speaker terminations.
Moreover, it is that
the buffer amplifier which the inside of an input circuit also arranged the
signal changeover relay immediately after the input terminal, and has improved
the crosstalk between each source greatly, and also was mounted on the same
substrate as a relay carries out a low-impedance drive,The outstanding channel
separation by low-impedance-izing of a circuitry is realized.
amplifier part is expanding the original super linear circuit which carried out
the pure Class-A operation and which Pioneer has cultivated to the last stage of
a large current, in spite of final-stage a unreturned stream composition, attained 0.05% of low distortion, and also has realized the high dumping factor
The one molding silence chassis of the newly developed high precision is adopted as a chassis.
The torsion-proof property, the impact property-proof, and the newly developed
special resin material excellent in secular change are developed and adopted.
The internal and external oscillation is efficiently reduced by making
it the form which suited each block at the same time this supports a main
electromagnetic-induction noise and a magnetic distortion are sharply controlled
The stack type electrolytic capacitor of a low flux noise developed in pure first class amplifier is adopted as a power-source part, and capacity sufficient with low flux density and a power transformer with the outstanding regulation property are adopted, and the flux noise is stopped low.
The handmade attenuator type with the same basic structure as what was adopted as Exclusive C7 is adopted as a volume.
Unlike that to
which it constitutes from the carbon resistor and high precision contact which
selected one step carefully at a time, and a sound volume is changed by general
slide resistor, there is little influence by a temperature, humidity, etc., the
level difference of the tone-quality transition and right and left by contact
resistance is eliminated, and the stable control is enabled.
In order to
pierce through the design of a tone-quality first priority, it is dared to omit
attached functionalities, such as a tone control, a balance, a loudness, and the
speaker output is also made into one line. While this suppresses the delicate
influence by the circuitry or switchpoints, shortest-ization of the event of a
product-line step or a signal path is enabled.
Moreover, the grounding side
of each input source was also changed simultaneously, and the separate grounding
design which eliminates the signal interference between the connection
assemblies from the grounding side is adopted.
The Phono equalizer has 1
chip dual FET input composition.
The input terminal carries one balance
input and has adopted the reliable gilding termination as all the terminations.
Moreover, the speaker terminal has adopted the large-sized vice type.
The mass very-thick type OFC power cord is adopted. This power cord has
adopted the scheme pulled out out of a case from just under a power transformer,
and is reducing the influence of external noise.
the high-class type carried out aluminum Naked shaving
appearance, and the rotary knob, and the resistor and capacitor which were
selected carefully are adopted.
The fraction which makes the generated
heat absorb by having carried out the intensive placement of the power
transistor, and the fraction diffused effectively were distributed, and the new
heat-dissipation structure where consideration was carried out to the location
of a heat sink, form, and the path into which air flows is adopted.
Moreover, the new type which changes the length of a fin and suppresses a
vibration is adopted as the heat sink made from aluminum.
||Stereo Integrated Amplifier
|Output power (both channel drive)
||35W+35W (8 ohm, 20Hz - 20kHz, 0.05%)
|Dumping factor (8ohm)
||150 (20Hz - 20kHz)
||Phono man month: 2.5mV / 50kohm
disk, Tuner, Line, Tape:150mV /, 50kohm
Balance: 150mV/600 ohm
|Phono maximum permissible input
||man month: 150mV (1kHz, 0.05%)
|An Output voltage/impedance
||Tape Rec: 150mV / 1kohm
||Phono man month: 20Hz-20kHz}0.2dB
compact disk, Tuner, Line, and Tape:1Hz-150kHz+0 -3 dB
|S/N (IHF, A network)
compact disk, Tuner, Line,
|Power consumption (Electrical Appliance and
Material Control Law)
||Width 440x height 198x depth of 480mm