Big Muff Pi

Electro-Harmonix didn’t call it a fuzz. The box said “distortion/sustainer,” and the second word is the important one. Hold a note on a Big Muff and it doesn’t want to die.

Here’s why. There are four transistor stages. The first one takes in your guitar, and that’s where the Sustain knob lives. Then come two identical clipping stages, each with its own pair of diodes, one right after the other. Clip a signal once and it gets rough. Clip it again and it turns thick and saturated, which is how a fairly gentle circuit ends up sounding like a wall.

Between those and the output stage sits the tone control, which blends a low-pass filter with a high-pass one. At noon it scoops out the middle, so you get big lows and a fizzy top with a hollow in between. Three knobs: Volume, Tone, Sustain. On a chord, in a small room, it sounds enormous.

The Big Muff changed clothes a lot, and every version has its fans. The first was the Triangle, a grey case with black letters and the knobs set in a triangle, smoother and less fuzzy than what came later. From 1973 there was the Ram’s Head, a bigger case with a ram’s head in the corner and a growlier midrange. In 1976 came the red-and-black graphics most people picture.

The Ram’s Head is David Gilmour’s favorite, and you can hear why on “Comfortably Numb.” For the solo his Black Strat went through an MXR Dyna Comp and a Ram’s Head Big Muff, then into Hiwatt amps with a Yamaha rotary cabinet blended in. Listen to how long those bent notes hang there. That’s the sustainer doing its job.

It was supposed to sound like Hendrix. It sounded like a bigger amp than you owned.

Carlos Santana was on one early. Alex Lifeson and Cliff Burton had them too.

In 1984 Electro-Harmonix went bankrupt, and the Big Muff stopped. That could have been the end of it.

Instead it came back from Russia. In 1992 Matthews revived it through his Russian company, Sovtek, and the Russian Muffs got nicknames: the “Civil War,” the “Green Russian,” the “Black Russian.” They had more bass than the New York ones. Lee Ranaldo and Thurston Moore of Sonic Youth preferred them.

By then the name had gotten into the culture on its own. Mudhoney called their 1988 debut EP Superfuzz Bigmuff. Depeche Mode had an instrumental called “Big Muff” back in 1981. When Nirvana made Nevermind, Butch Vig remembers, “Kurt had a Big Muff... And he had a RAT.” Vig had a Russian Big Muff of his own, though, so who played what on which track is muddy.

In 2000 production came home to New York with the NYC Reissue, a revised take on a late-’70s model.

The late-’70s Op-Amp Big Muff swapped the transistors for op-amps and came out mid-heavy and even more saturated. In 1993 Billy Corgan used one on Siamese Dream. Put the record on and listen to the guitars lock together into one solid sheet of sound.

The list of people who leaned on a Big Muff reads like a tour of loud guitar: the Jesus and Mary Chain, J Mascis, Kevin Shields, Jack White, the Edge. Electro-Harmonix kept spinning it off, too. There’s a Little Big Muff and a Nano, a Metal Muff, a Deluxe, a bass version, a J Mascis signature, and reissues of the Triangle, the Ram’s Head, the Op-Amp, and the Green Russian. In 2025 a Big Muff 2, made with JHS, put an unreleased Bob Myer circuit into a box.

Gilmour’s notes that won’t die and Corgan’s solid sheet have almost nothing in common, except the box on the floor. Matthews and Myer set out to catch somebody else’s sound. What they caught was size, and every player since has filled it with their own.