YAMAHA M-2 (1980) | High-fT Power

 

This power amplifier was originally released in Japan in 1979 as the B-5, quickly followed by this international market M-2 with added power level meters. The M-2 is a Natural Sound High-Performance Power Amplifier - The Authority of True Sound. Power alone does not define greatness — control does. The M-2 stands as a testament to Yamaha’s relentless pursuit of sonic truth, where immense output is harnessed with absolute precision. At its core lies an advanced circuit architecture: a low-noise dual FET input stage in cascode bootstrap configuration, seamlessly feeding a current mirror driver and a meticulously engineered three-stage complementary push-pull output. Guided by Yamaha’s exclusive Linear Transfer Bias system, the M-2 achieves what lesser amplifiers cannot—vanishingly low crossover distortion and a purity of tone that remains uncolored, even under the most demanding conditions. Each stage operates in perfect harmony, balancing wide bandwidth performance with carefully applied negative feedback, ensuring that every nuance of the music is preserved intact. Transcending the Limits of Conventional Design. Traditional power transistors, long constrained by thermal instability and switching distortion, have been reimagined. Yamaha’s specially developed high-frequency power transistors defy these limitations, maintaining stability where others falter. The result is a clarity that extends effortlessly into the highest frequencies, free from harshness or strain. Fine detail emerges naturally, supported by a seemingly endless reserve of power—delivered with authority, yet never at the expense of musicality. Linear Transfer Bias — Precision at the Threshold. At the heart of the M-2’s remarkable transparency lies the Linear Transfer Bias circuit. By precisely controlling the operating point of each output transistor, Yamaha eliminates the discontinuities that typically plague push-pull designs. The effect is profound: a smooth, continuous transfer characteristic that virtually erases crossover distortion, particularly in the delicate low-level signals where music breathes and lives. Whether delivering a whisper or a crescendo, the M-2 maintains its composure, its accuracy unwavering. Performance You Can See — Purity You Can Hear. Measured at a demanding 20 kHz, distortion remains extraordinarily low across a wide output range—from a commanding 200 watts down to just 2 watts. Where conventional designs falter at lower levels, the M-2 remains composed, preserving the integrity of even the faintest musical detail. Crafted Without Compromise. In a component of this caliber, nothing is incidental. Every detail, every material, every connection is chosen with singular purpose. A centrally mounted toroidal transformer anchors the design, flanked by massive filter capacitors to ensure optimal energy flow. Signal paths are kept exceptionally short, while thick copper bus bars provide a flawless grounding foundation. Circuit boards feature heavy copper traces for superior current handling, and carefully selected components—from phase-accurate polystyrene capacitors to induction-free resistors—preserve signal integrity at every stage. Gold-plated terminals, precision coaxial cabling, and meticulous internal layout reflect a philosophy where engineering and craftsmanship are inseparable. The M-2 is not merely an amplifier. It is an instrument—designed to reveal music in its most natural, unrestrained form. Specifications: Power rating 200 W/ch (0,005% THD) | Damping factor 200 | Frequency response DC - 100.000 Hz | Size (W/H/D) 435x183x362mm | Weight 23kg | Original sale price in Germany 2590 DM

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