Marshall Shred Master Distortion MK1 (Vintage Original, Made in England)

The Marshall Shred Master Distortion MK1 is a vintage original high-gain distortion pedal produced in England during the early 1990s. Designed to deliver the aggressive, saturated character associated with high-gain Marshall amplifiers of the era, the Shred Master became known for its thick distortion, powerful low end, and pronounced upper-mid presence.

Unlike simpler distortion pedals, the MK1 features an extensive tone section with Gain, Volume, Bass, Contour, and Treble controls. The Contour knob allows you to shape the midrange character, moving from a more scooped, modern voicing to a focused, cutting mid-forward sound. This flexible EQ section makes the Shred Master suitable for tight rhythm work as well as singing, sustaining lead tones.

The distortion character is dense and harmonically rich, with ample sustain and a slightly compressed response that works particularly well for heavier styles. At lower gain settings, it delivers a gritty, articulate drive with strong note definition.

The Shred Master MK1 is famously associated with Jonny Greenwood of Radiohead, who used it extensively during the band’s early and mid-1990s period. Its distinctive, biting distortion can be heard on recordings such as the album OK Computer, where it contributed to the sharp, cutting guitar textures that defined that era of alternative rock.

Housed in the large black steel Marshall enclosure, the MK1 version is recognized for its robust construction and distinctive industrial design. As a vintage original made in England, this unit represents the early production era of the Shred Master and is valued for its authentic circuit and period-correct build quality.