The Electro Harmonix Big Muff Pi 2 revives a forgotten fuzz design from the late ’70s, uncovered and brought back to life decades later. Built around a dual op amp circuit that never originally reached production, it delivers a distinct take on the classic Big Muff sound. Expect thick sustain, huge gain, and a slightly rougher clipping character, with crispy highs and booming lows that feel raw and energetic.
 
Housed in a compact nano enclosure, the Big Muff Pi 2 keeps the familiar Volume, Tone, and Sustain controls for easy dialling. True bypass switching ensures your clean tone stays intact, while a latching or momentary footswitch lets you unleash quick bursts of fuzz on demand. With artwork by Daniel Danger and unmistakable Big Muff attitude, this pedal is a must try for players who want classic Muff flavour with a unique edge.
Lost Big Muff circuit revived
The Big Muff Pi 2 stands apart from other Muff variants thanks to its unusual dual op amp circuit. Originally designed in the late ’70s but never released, this topology delivers a slightly less refined, more aggressive clipping character. The result is a fuzz that feels raw and alive, with a touch more dynamics than a traditional Big Muff. Notes bloom with sustain but still respond to picking strength, making the pedal feel interactive rather than compressed or flat.
Familiar yet distinctive fuzz tone
Tonally, the Big Muff Pi 2 sits firmly in familiar Muff territory while offering its own flavour. Booming lows provide the foundation, while a crispy top end helps chords and single notes cut through a mix. The midrange is slightly rougher and more open, giving the fuzz a gritty edge that works especially well for garage rock, stoner riffs, and lead lines that need attitude rather than polish.
Simple and effective controls
Despite its wild sound, the control layout remains simple and familiar. Volume sets the overall output, Tone sweeps from thick low end to biting treble, and Sustain controls everything from mild grit to full fuzz saturation. This straightforward layout makes the pedal easy to dial in on the fly, whether you’re stacking it with other drives or using it as your main source of distortion.
Expressive switching options
A modern addition sets the Big Muff Pi 2 apart even further: a silent true bypass footswitch with latching and momentary operation. Click it for standard on off use, or hold it down for short bursts of fuzz chaos. This feature opens up expressive possibilities for accents and transitions, making the pedal as playful as it is brutal on a pedalboard. It rewards creative players who use fuzz dynamically rather than leaving it permanently engaged. Small touches like this make it feel thoughtful and modern without losing vintage spirit.
Specifications
Product Name: Electro Harmonix Big Muff Pi 2
Product Code: Big Muff Pi 2
Controls
Controls: Volume, Tone, Sustain
Electronics
Circuit type: Dual op amp fuzz
Bypass: True bypass
Footswitch: Latching and momentary
Power
Power supply: 9V battery included
Power adapter: Optional