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Yamaha M-80

Natural Sound Stereo Power Amplifier (1984-85)

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Yamaha M-80


Power output: 250 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.003%

Damping factor: 250

Input sensitivity: 1.55V

Signal to noise ratio: 127dB

Dimensions: 435 x 165 x 425mm

Weight: 23kg


instruction/owners manual   English -

service manual (low res)  English - andi91265

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Reviewed May 08th, 2015 by superhawk996

What can be said? Massive dual monoblock that puts out 250W per channel. Sound is uncolored to my ear. This amp can be pushed to crazy output levels and still remain undistorted. Combined with any of the C series pre-amps this is sonic heaven!



re: M-80

Does anybody knows the upc code or product id

re: M-80

Its not a "massive dual mono block" for petes sake look at the schematic. It is a power house though.
Both transformers supply both amplifiers.

re: M-80

from the amplifier schematic, the pre-amp/drive portion seemed quite good by applying low-distortion design however, the power output stage seemed lack of power output transistors, it could be the cost of the power transistors because many years ago, power transistors were quite expensive and so it could only apply 4 power output transistors on each channel instead of 8 (or more), it would make the machine could not handling 6 or 4 ohm speakers properly and it seemed some waste for such a big dual power supply system.

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