The Electro Harmonix Micro Metal Muff Distortion with Top Boost, a compact version of the original 1969 Muff Fuzz, offers the ideal rhythm overdrive when you crank up your amp and roll back the guitar volume. It imparts a hint of edgy funkiness, reminiscent of a vintage tube amp with a well-worn yet warm speaker. With a smaller enclosure and streamlined controls, the Micro Metal Muff produces the same intense metal drive that its larger counterpart is renowned for. It's a ferocious sound that a metallurgist would dream of.