Pioneer A-535
¥ 39,800 (released in 1989)
Commentary
A high cost performance pre-main amplifier that inherits the clean and real philosophy of A-636.
The function switch is placed in the signal input section to minimize the length of the signal path, thereby suppressing sound distortion.
In addition, it is equipped with a direct switch that can jump switches and circuits such as balance, tone control circuit, and loudness circuit. This allows direct input to the power amplifier section.
Vibration isolation measures are applied to each part to suppress self-vibration and external vibration.
A honeycomb chassis has been adopted and a honeycomb heat sink with excellent heat radiation effect and vibration damping characteristics has been adopted.
Equipped with non-switching circuit type II, thermal distortion caused by drift of idle current and non-linear distortion of output stage are greatly improved.
All parts are required to be completely non-magnetic and to have excellent anti-vibration performance. We have carefully considered and adopted resistors, capacitors, and cords.
Equipped with MM/MC equalizer switching function which can be used with MC cartridge.
Uses an extremely thick oxygen-free copper power cord with polarity display that takes into consideration the effect of external noise.
The power plug uses nickel phosphorus plating to reduce non-linear distortion, and the speaker terminal uses a large vise type terminal.
Oxygen-free copper wires are used for signal and power cables, and copper-plated screws are used for vibration absorption.
Model Rating
Type | Stereo pre-main amplifier | ||||
Rated Output (Both channel drive) |
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Damping factor (1 kHz, 8 Ω) | 100 | ||||
Input Sensitivity / Impedance | Phono MM : 2.5mV/50k Ω Phono MC : 0.2mV/100 Ω CD, Tuner, Line, DAT/Tape1, Tape2 : 150mV/40k Ω |
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Phono maximum allowable input (1 kHz, 0.008%) |
MM:150mV MC:12mV |
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Output Level / Impedance | DAT/Tape1, Tape2, Line, Rec, Adaptor Out : 150mV/2.2k Ω | ||||
Frequency characteristic | Phono MM : 20 Hz to 20 kHz ± 0.3 dB Phono MC : 20 Hz to 20 kHz ± 0.5 dB CD, Tuner, Line, DAT/Tape1, Tape2 : 2.5 Hz to 100 kHz + 0 -3dB |
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Tone control (Volume -40dB) |
Bass : ± 8 dB (100 Hz) Treble : ± 8 dB (10 kHz) |
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Loudness contour (Volume -40dB) |
100Hz:5dB 10kHz:3dB |
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Signal-to-noise ratio (IHFA network Short circuit) |
Phono MM:88dB(2.5mV) Phono MC:70dB(0.25mV) CD, Tuner, Line, DAT/Tape1, Tape2 : 107 dB |
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Speaker load impedance | A, B : 4 Ω ~ 16 Ω A + B : 8 Ω ~ 32 Ω |
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Power supply voltage | 100 VAC, 50Hz/60Hz | ||||
AC outlet | Power switch interlock : 2 systems (200W) Power switch not linked : 1 system (100W) |
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Power consumption (Electrical Appliance and Material Control Law) | 160W | ||||
External dimensions | Width 420x Height 126x Depth 351 mm | ||||
Weight | 8.1kg |