PS-103 Driving Box Compressor

The Guyatone PS-103 Driving Box Compressor is an analog compressor pedal produced in Japan in the mid-1970s. It features responsive and smooth compression, with simple Output and Sensitivity controls that belie a wide array of adjustable compression. The circuit includes a metal can CA3080 IC chip, delivering a low noise floor and functioning decently well as a limiter depending on user inputs. The pedal allows the player to pre-set a limited level of output which, while maintaining a constant volume, will produce a clean, undistorted sustain.