The Ampeg Opto Comp Analogue Optical Compressor pedal utilises an optical circuit to deliver smooth, vintage style compression to add headroom and sustain to your guitar or bass. Dial in a fast, subtle style to control peaks or crank up the compression to add a unique character. Featuring a roadworthy all-metal chassis and true bypass switching, the Opto Comp Analogue Optical Compressor brings your tone to new heights.