The Yamaha M-2 is a power amplifier that was produced in the early 1980s. It features a robust design that prioritizes audio fidelity and durability. This model is part of Yamaha's M series, which is characterized by high power output and low distortion levels. The M-2 is capable of delivering up to 250 watts per channel into 8 ohms and up to 400 watts per channel into 4 ohms. It includes a high current capability, which allows it to drive challenging speakers effectively. The amplifier utilizes a differential input stage and an advanced protection circuit to ensure reliable operation even under demanding conditions.