MXR Dyna Comp

The MXR Dyna Comp is a compressor pedal introduced in the mid-1970s, featuring a simple two-knob design — output and sensitivity — that delivers optical-style compression in a compact enclosure. One of the most widely used compressor pedals in rock history, it adds sustain, evens out picking dynamics, and subtly fattens the signal going into an amplifier. Buzz Osborne of the Melvins uses the MXR Dyna Comp as part of his minimal pedalboard, where compression plays a key role in maintaining the sustained, crushing quality of his heavy riffing.