1969 Electro-Harmonix "Triangle" Big Muff Pi V1

The one that started it all! This is an extremely clean, 100% original example of the very first Big Muff. Produced in 1969, this Big Muff Pi V1, dubbed the "Triangle" Muff for the triangular layout of the knobs, this is one of the rarest and most highly sought after pedals on the vintage market!