Big Muff Pi

The Big Muff Pi, in its different incarnations, is probably Electro-Harmonix's most popular product. This four-transistor fuzzbox is one of the first high-gain distortion units on the market. Its characteristic dirty, harmonically rich distortion tone, combined with its reliability and accessible price have made it greatly popular. It is also the origin of the Big Muff tone control.

Versions (USA)

Triangle PNP

This is the original Big Muff. It's the most difficult to find and typically the most expensive to purchase.

Model Number: EH-3003
Release Year: Early-Mid 70's
Original Retail Price: $39.95US

• Schematic at GEOFEX
• Aron's Site Dragonfly's layout and parts list
• Uzzfay Utsgay Original PC board artwork, layout, and gut shots.

Opamp

OpAmp Big Muff

Further reading

• Versions
• RonSound's article on Muff family history
• Big Muff and Guitar Effects Museum Lot's of BMP photos.