EHX Big Muff

Name: EHX Big Muff
Price: 39 USD
Author: MixWave

by MixWave · Distortion · Big Muff fuzz model (three versions)

Not rated yet

An official Electro-Harmonix plugin that models three Big Muff circuits: the original Big Muff Pi, the Ram's Head and the Russian.

You can switch between them instantly. It costs $39 on sale (normally $79).

Best for: Guitars, Bass, Keys & Synths, Sound Design. Genres: Rock & Indie, Metal, Lo-Fi.

Keywords: fuzz, hardware emulation, bass, thick, electric guitar, fat, smooth, synths, 70s, aggressive, circuit-modelled, classic, clean, component-modelled, dark, heavy, licensed emulation, lo-fi, mixing, single-band, sound design, vintage.

What it does

EHX Big Muff is MixWave's officially licensed model of the Electro-Harmonix Big Muff fuzz, made in collaboration with Electro-Harmonix. It puts three versions of the circuit in one plugin, built with "detailed component-level modeling" of the analog originals.

Big Muff Pi: the original design, described by MixWave as thick, sustaining and harmonically rich.
Ram's Head: a refined version with a smoother response and a slightly more focused midrange; Sound On Sound found it the most focused of the three.
Russian: a darker, heavier take on the circuit with a stronger low end.
Pedal controls: Volume, Tone and Sustain knobs, as on the hardware, plus a switch to change circuits from the panel.
Tone range: from smooth sustain to aggressive distortion, depending on Sustain and the circuit chosen.
Upsampling: an option to process at a higher rate for cleaner reproduction of the distortion.

It is part of MixWave's EHX Classics Bundle. A fully working 14-day trial is available.

Source: MixWave product page

When to use it

EHX Big Muff is the pick when you want the specific Big Muff fuzz, with the developer and Electro-Harmonix behind the model, rather than a general distortion. Compared with Saturn 2 or Dist COLDFIRE, it has far fewer controls and no multiband or modulation options, but it gets the classic wall of sustain with three knobs. It is less extreme and less flexible than Devil-Loc Deluxe, and it is a single fuzz pedal model rather than a multi-stage sound-design distortion like Thermal. Having three circuit versions in one window makes it more useful than a single-variant fuzz, and on sale it costs far less than Saturn 2.

Best for: thick fuzz guitar, fuzz bass and saturated synth leads.
Genres: rock, indie, stoner, shoegaze and lo-fi.
Look elsewhere if: you want subtle saturation or multiband control; Saturn 2 covers that.
Tip: pick Ram's Head when the fuzz needs to cut through a mix; the Pi and Russian versions sound fatter.

What producers say

Early press coverage is positive about accuracy; there are few user reviews yet.

Sound On Sound (Paul White, July 2026, reviewing the EHX Classics Bundle) called it "three pedals in one" and praised the "sonic accuracy" of the models and the sensible pricing.
Sound differences: the same review found Ram's Head the most focused version, with the other two "fatter".

Sound On Sound review (EHX Classics Bundle)

Where to buy

MixWave: $39 (regular $79)

Tutorials and reviews

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