SOLD - FOR SALE: Pioneer A-09

Item #649379962
Info: Pioneer A-09

Asking Price:
CAD $2500.00
Retail Price: CAD $4800.00
Payment method: Cash, Paypal, Interac/EMT
Shipping weight: 30.00 (kg) Calculate Shipping
Shipping Dimension: 60.96cm x 60.96cm x 35.56cm
Condition: 10 - Mint (?)
Date Posted: Sep 19, 17 12:19pm (PST)
Edited: Oct 28, 17 9:51pm
About Seller: zmax
zmax is a premium user
Brampton, ON
Canada
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Product Brand: Pioneer
Product Model: A-09
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Description

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The last ultra 2 channel from Pioneer Exclusive lineup, the best and most musical integrated amplifier ever made, sold at $4800 new. Super rare item made for Japan market only. In great shape fully functional.

Build from a selection of best possible parts in it, outstanding quality and sound that appears from total silence without any distortion. It will drive any size speakers without hesitation.
It is the highest A class integrated amplifier with symmetrical twin monophonic construction on anti vibration resin base with pure carbon stabilizer feet.

It has TAP non magnetically designed box with adopted floating structure and vibration absorbing rubber.
Hand made 40 steps attenuator from silver with calibrated resistance array with max of 0.05 db balance error, identical as one on ultra expensive Exclusive C7 control amplifier.

Pure class A operation, 0.05 % total distortion with dumping factor of 200.
35w at 8 ohm per channel
70w at 4 ohm per channel

Translation of detailed information from http://audio-database.com/PIONEER-EXCLUSIVE/amp/a-09-e.html ;

In the inside of the certain requirements of "Integrated Amplifier in the technician of Pioneer The 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.
Moreover, 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.

The 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.
An included 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.
The signal 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.

A power 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 200.

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 unit firmly.
An electromagnetic-induction noise and a magnetic distortion are sharply controlled for nonmagnetic.

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.

Rating of a model;
Form Stereo Integrated Amplifier
Output power (both channel drive) 35W+35W (8 ohm, 20Hz - 20kHz, 0.05%)
70W+70W (4ohm)
Dumping factor (8ohm) 150 (20Hz - 20kHz)
200(1kHz)
Input sensitivity/impedance Phono man month: 2.5mV / 50kohm
compact 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
Frequency characteristic Phono man month: 20Hz-20kHz±0.2dB
compact disk, Tuner, Line, and Tape:1Hz-150kHz+0 -3 dB
S/N (IHF, A network)
Short circuit Phono MM:87dB
compact disk, Tuner, Line, Tape: 109dB
Supply voltage AC100V, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Control Law) 220W
Dimensions Width 440x height 198x depth of 480mm
Weight 28.8kg






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