Pioneer A-01

Commentary

Pre-main amplifier with wide-range technology.

It is equipped with a wide-range linear circuit developed for stable amplification of input signals from digital devices.
This circuit is a simple circuit for obtaining the gain required by a single-stage amplifier circuit. It has excellent current linearity and flat output impedance from low to high range.
In addition, the triple-feedback system realizes high stability even in the high-frequency range, improving the ability to reproduce minute sounds and driving the speakers over a wide range with sufficient space.

The low-load drive design improves the drive performance of the speakers at low loads, enabling stable playback from low to high frequencies.

It employs a highly rigid wing chassis that effectively disperses and attenuates vibration from the power transformer.
It effectively eliminates vibration from the transformer to the wing shape at the bottom of the chassis and from the directly connected insulator to the outside of the amplifier.

In order to simplify the signal path as much as possible, the function switch is laid out in the shortest position at the signal input section.
In addition, by switching the direct switch, switches and circuits such as balance, tone control circuit and loudness circuit can be bypassed, and input directly to the power amplifier section.

Round shape is used for the front panel.

Equipped with Route 6 audio input.
In addition, Tape1 and 2 support mutual dubbing.

A large speaker terminal is used to prevent transmission loss and provide a stable current supply.

Model Rating

Type	Stereo pre-main amplifier
Maximum Practical Power (EIAJ)	70W + 70W (4 Ω)
Rated output (both channels driven)	40W + 40W (4 ohm, 20 hz to 20 khz, 0.1%) 35W + 35W (8 ω, 20 Hz-20 kHz, 0.07%)
Input Sensitivity / Impedance	Phono MM : 2.8mV/50k Ω CD, Tuner, Line, Tape1/DAT, Tape2 monitor : 200mV/50k Ω
Phono maximum allowable input	MM : 150 mV (1 kHz, 0.1%)
Output Level / Impedance	Tape1/DAT, Tape2 monitor : 200mV/1k Ω
Frequency characteristic	Phono MM : 20 Hz to 20 kHz ± 0.5 dB CD, Tuner, Line, Tape1/DAT, Tape2 monitor : 5 Hz to 100 kHz + 0 -3dB
Tone control	Bass : ± 8 dB (100 Hz) Treble : ± 8 dB (10 kHz)
Loudness contour (VR-30dB)	+ 5 dB (100 Hz), + 3 dB (10 kHz)
Signal-to-noise ratio (IHF, A-network Short circuit)	Phono MM:77dB(2.8mV) CD, Tuner, Line, Tape1/DAT, Tape2 monitor : 105 dB
Speaker load impedance	A, B : 4 Ω ~ 16 Ω A + B : 8 Ω ~ 32 Ω
AC outlet	Power Switch Interlock : 2 Systems (100W) Power switch not linked : 1 system (100W)
Power supply voltage	100 VAC, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Control Law)	105W
External dimensions	Width 420x Height 110x Depth 312 mm
Weight	5.2kg