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Big Muff Pi - Famous Opamp Version


Opamp version of the Muff made famous by many guitarists.

Sounds uniquely amazing and heavy!


If you are looking for the traditional Big Muff or any variant of it, then you want the BMP Muff'n circuit. Board Dimensions (W x H) 2” x 1.65” ca. 50.2 mm x 42mm

BMP Opamp Build Instructions

Always use the Forum's Layout Gallery Page for each individual circuit for the most information, mods and tips, that are not contained in the basic build document above.

Big Muff Pi  - Audio Demo

Goes Great with the new Tone TwEQ

If you are looking for the traditional BMP, then you want the Muff'n.

This goes great with a Stage 3 Booster

Recommended accessories:

1. Barry's Famous Pot Condoms™ .

2. 3PDT Wiring Boards .

3. Barry's Best Pedal Hookup Wire.

4. DPDT Wiring Boards - Perfect for Mods

5. DC Power Jacks 2.1mm

6. Common Anode LED (Optional to Standard LED )

7. Plastic Bezels for Common Anode LEDs

8. Pot Condoms for mounting in tight quarters over potentiometers

9. GPCB Secure Mounts - For mounting with room to spare

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