Used 2010s Carl Martin CLASSIC OPTO-COMPRESSOR Effect Pedal

Used 2010s Carl Martin Classic Opto-Compressor in good condition, delivering smooth, studio-style optical compression for guitar or bass. Simple controls let you dial in compression level and output volume for everything from subtle sustain to tight, punchy dynamics. Built in a rugged metal enclosure with true bypass switching, standard 1/4" in/out, and powered by 9V DC (center-negative). A dependable tone-shaping tool for leveling cleans, adding sustain, and enhancing overall feel.