Yamaha PS-400

The Yamaha PS-400 is a professional-grade stereo power amplifier designed for use in recording studios, live sound reinforcement, and home audio systems. It was released in the late 1980s and has been used by many professional musicians and audio engineers. The PS-400 is a two-channel amplifier with a power output of 200 watts per channel into 8 ohms. It features a low-noise design, a wide frequency response, and a high damping factor. It also has a built-in limiter and a low-cut filter to help reduce distortion and noise. The PS-400 is a reliable and powerful amplifier that is still used in many professional audio applications today.