The particular Beaver is patterned after a “ram’s head” Muff, so named because the pedal featured the now-seldom-used Electro-Harmonix ram’s head logo. This was a 1970s incarnation of the Muff circuit and is renowned for versatile, singing lead tone.
One look at Kevin Wilson’s extensive catalog of effects will tell you that he knows what he’s doing. That said, when the man makes a Muff, it’s time to listen up. And so it came to be, and it was christened the Dirty Beaver.
With three switches for Fuzz, Drive and Boost, it's the ultimate weekend warrior pedal. The Fuzz side is based on a vintage '70s silicon fuzz, with an internal bias control for all the spitty, raspy fuzz a player could ever desire.