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Yamaha M-4

Stereo Power Amplifier (1979-83)

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Yamaha M-4


Power output: 120 watts per channel into 8Ω (stereo)

Frequency response: 1Hz to 100kHz

Total harmonic distortion: 0.005%

Damping factor: 200

Input sensitivity: 1V

Signal to noise ratio: 118dB

Speaker load impedance: 4Ω to 8Ω

Semiconductors: 81 x transistors, 3 x IC, 2 x dual FET, 34 x diodes, 2 x bridged diodes, 2 x zener diodes, 28 x LED

Dimensions: 435 x 145.5 x 374.5mm

Weight: 18.5kg

Year: 1980


instruction/owners manual   English -

service manual   English - Ivy Caudieus

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Reviewed Jun 07th, 2015 by craigtone

Probably my favorite vintage solid-state amplifier. I was a tube amp aficionado until I got my hands on a used M-4. This amp gave me confidence back in solid-state gear. I regret selling it and am still always on the lookout for the coveted M-2 (the M-4's bigger brother).

Reviewed Nov 06th, 2014 by ehg

Found mine by accident and it sounds great!
It is partnered to a C2x and the NS1000m which were formerly coupled to a Medevoort poweramp.
Some say I should re-cap it, but first I''m going to enjoy its sound for a few days?

Reviewed Apr 05th, 2014 by Genpatton

Had this amp back when I was in College, but had to sell it. Just picked up another in excellent condition. Its a great, sweet sounding amp that is under rated in my opinion.




Thanks for the free manual!

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