Stomp Under Foot The Pi

The Pi is a fuzz pedal from Stomp Under Foot, a builder whose catalog is built heavily around Big Muff variations. What sets The Pi apart from most of that catalog is that it does not chase one specific vintage unit. Premier Guitar called it "a Muff clone that doesn't strive to precisely replicate a known classic," and said it instead "focuses on the interesting combination of attitude and civility shared by many Muffs from the '70s and '80s"¹.

For a player, that means the familiar Big Muff experience, thick, sustaining fuzz shaped by three knobs, but voiced as a blend of eras rather than a museum copy of a single circuit¹.

A Big Muff-based fuzz that draws on many Muffs

The Big Muff Pi, made by Electro-Harmonix, is a fuzz/distortion/sustain pedal that EarthQuaker Devices' Fuzzcyclopedia calls "the wildly influential Big Muff Pi and its many iterations" of the 1970s³⁴. Those many iterations matter here, because different eras of the Big Muff sound meaningfully different from one another, and most Muff clones pick one.

Stomp Under Foot's own range shows how that usually works. The builder's Op-Amp Fuzz is listed by Big Muff historian Kit Rae among the later replicas of the Electro-Harmonix Big Muff Pi Versions 4 and 5, the op-amp era of the circuit⁵. The Pumpkin Pi, another Stomp Under Foot pedal, is described by the maker as "inspired by the classic 1977 op-amp fuzz"².

The Pi takes the opposite approach. Rather than cloning the Ram's Head, the op-amp version, or the Civil War era, it borrows from across the line. Premier Guitar's reviewer heard the result as "a fuzz vehicle that's perfect for everything from slick-and-dirty Ernie Isley lead tone" onward, and summed up its scope as "Amazing range for a Muff clone"¹.

Controls, looks and build

The control set is the classic three-knob Muff layout¹:

Visually, the pedal stands out. Premier Guitar described "its gunmetal, metallic-flake paint and a Klingon-esque take on the Pi symbol" on the enclosure¹. Inside, the reviewer found "the guts of the pedal are unfussy and well built"¹, a point worth noting for players who care about hand-wired construction and serviceable layouts.

Power

The Pi's power jack is not top-mounted. Premier Guitar's reviewer noted, "though a top-mounted AC jack would be nice," which places the jack on the side of the enclosure and means players with tightly packed pedalboards may need to plan their patching and power routing around it¹.

For reference within the same maker's line, Stomp Under Foot specifies its pedals for "9V Battery or 2.1 9V Adapter Only" on its product pages, as it does for the Pumpkin Pi². That is a standard 2.1mm barrel connection of the kind most isolated and daisy-chain supplies use.

What the reviewer said

Premier Guitar's 2021 review is the main published assessment of The Pi, and it was positive on both build and sound. The reviewer found the construction unfussy and well built, praised the pedal's range for a Muff clone, and noted the side-mounted power jack as the one ergonomic miss¹. The review also placed the pedal's voicing in context, describing it as a Muff clone that blends attitude and civility from the 1970s and 1980s versions rather than copying a single classic¹.

Where it sits in the Stomp Under Foot range

Stomp Under Foot builds many Muff-family fuzzes, most tied to a specific era or version. The Pi is the generalist of the line: a Muff circuit that draws on the whole family rather than one vintage unit¹. Players comparing it against the builder's era-specific offerings, such as the Op-Amp Fuzz⁵, are effectively choosing between a focused vintage copy and a blended take on the circuit.

Videos

Click to load

Click to load

Click to load

Questions