The Pioneer SX-950 is a vintage stereo receiver that was released in the late 1970s, during an era often considered the 'golden age' of stereo equipment. It has a power output of 85 watts per channel and features include a built-in AM/FM tuner, multiple inputs for devices like turntables and tape players, and extensive tone control capabilities. The unit is recognized for its robust construction and the quality of its sound output, delivering clear and powerful audio performance.