Here is an original American-made Electro-Harmonix Big Muff Pi from 1978/1979, featuring the sought-after V5 Op-Amp circuit.

This generation holds a special place in Big Muff history. Unlike the classic four-transistor versions, it uses an operational amplifier-based design, producing a particularly aggressive, focused and cutting fuzz tone.

This circuit is especially appreciated for the thick, abrasive fuzz sounds associated with 1990s alternative rock.

The pedal features the iconic large metal enclosure characteristic of late-1970s Electro-Harmonix production in New York.

A distinctive vintage version of one of the most celebrated fuzz pedals ever made.

Made in the USA, circa 1978/1979.