Kamis, 18 Maret 2010

Pioneer M-73...Vintage Power Amplifier ( sold )

Pioneer M-73
75,000yen(around the 1980 time)

Description

Stereo power amplifier which adopted 2 power transformers.

The 2 steps of ±2 powering and differentials amplification current mirror circuitry and the final-stage parallel push pull pure complementary circuit are adopted as a circuit system.

A power-source part is adoption of 2 power transformers which improve a dynamic behavior, and has eliminated the cross interferencee between channels.
Moreover, with a stream composition with the capacitor of 12,000 micro Fx4, even if there is a low-pass continuous sound of a large swing, it reproduces with a margin.

The large-sized peek power meter with a logarithmic comression circuitry which can carry out the Direct reading of the output is equipped.

The protection network constituted from a quick electronic circuitry of a reliable power relay and a response is adopted, and a speaker and a transistor are protected from an emergency outage.

Two speaker output-terminals are carried and a play of A+B is also possible.

It is the panel design which can be mounted on EIA specification rack.

















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