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Accuphase M-100

Monophonic Power Amplifier (1986)

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Accuphase M-100


The Accuphase monophonic power amplifier M-100 is a product of a design approach which pursued an ideal heavy duty, high quality sound producing power amplifier.

It's array of eight power transistors in a parallel push pull (octo parallel push pull) output stage and its large capacity series regulator type power supply both attest to the seriousness with which we tackled the challenge.

The very low impedance characteristics under open loop conditions that was achieved together with the capacity to deliver continuously stable 500 watts of electrical energy at 8 ohms marks another successful forward step in audio technology.

The large power output of the M-100 does not merely mean big sound capability. It also means that a higher grade, quality sound is now available which is the direct result of Accuphase's positive design approach in introducing this outstanding monophonic power amplifier.

The Accuphase M-100 also features for the first time in the world, a Peak Power Direct Readout System with Digital Display. It permits direct reading of power output peak values which are numerically displayed in watts. It also permits peak value Hold Time selection up to 30 minutes for studies of peak power recorded during a choice of three Hold periods.

The surplus power and high quality sound of the M-100 will enable everyone to enjoy the unlimited beauty and depth of music to their hearts content.


Power output: 500W into 8Ω (mono)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.01%

Damping factor: 300

Gain: 27.8 dB

Input sensitivity: 2.6V

Signal to noise ratio: 130dB

Speaker load impedance: 4Ω to 16Ω

Semiconductors: 67 x transistors, 7 x FET, 21 x IC and 75 diodes

Dimensions: 480 x 232 x 476mm

Weight: 41.5kg


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This website is not affiliated with or sponsored by Accuphase. To purchase M-100 spares or accessories, please contact the company via their website or visit an authorised retailer.