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Electro Harmonix Big Muff PI USA

Nov 7, 2021
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The Electro-Harmonix Big Muff Pi is one of the most recorded fuzz pedals in history, and the NYC USA version is the direct descendant of the original. Mike Matthews and Bob Myer designed the four-transistor circuit back in 1969, and the Big Muff went on to define the heavy side of rock, grunge, and alternative for decades. If you’ve seen any of my other demos, you know I love myself a piece of Pi.

What makes the USA reissue worth revisiting is that it is still built in New York, still uses that original three-knob layout, and still sounds exactly like the reference everyone else is chasing. It’s not subtle and it doesn’t try to be.

Controls

Left to right, the panel is Volume, Tone, and Sustain. That’s it. Volume sets your output level, Tone shapes the frequency balance, and Sustain controls how much fuzz and gain is in the signal.

The Tone knob is the most context-dependent of the three. I find bridge pickups and single coils sit best around 11 to 12 o’clock, while humbuckers and neck pickups tend to want it pushed a bit past noon. It is really there to adjust the pedal to your rig rather than to reshape the character of the fuzz itself. In the demo above I’ve set up a Tone Knob sweep so you can hear the full range from closed and dark through to bright and open against a fixed Sustain of 8.

The Sustain knob tells a similar story. The biggest jump in gain happens when you move it off zero. Past noon, the differences become subtle, and it shifts from an audible change to a feel thing under your fingers. There is a Sustain Knob sweep in the demo too, running from 0 through 10 with Volume and Tone locked, so you can hear exactly where the gain stages kick in.

The Sweet Spot preset, with Sustain at 7 and Tone at 7, is a good place to start on most rigs.

How It Sounds

Out of this pedal you get one classic sound. It is not versatile, and it doesn’t need to be. The tone is thick and sustained, with a smooth saturation that washes out into a wall of harmonics when you push the Sustain knob. It handles single-note leads with long sustain and big chords with a satisfying density. There’s no gatiness or spitting. It just holds on and blooms.

The tone stack has a natural midrange scoop, which is why it sits so well under vocals and cuts through a full band mix without fighting anything. That scoop is also why running it into a clean amp works better than into a heavily voiced amp channel.

Big Muff Pi vs OKKO BFGRMWB

The OKKO BFGRMWB is a handwired boutique recreation of the Green Russian variant, tuned to a specific vintage V7D Bubble Font unit. Russian Muffs, including the BFGRMWB, tend to have a fuller low end, a slightly looser low-mid presence, and a more organic feel in the gain character. The OKKO also adds Mid Range, Rumble, and Presence controls that let you dial in the voicing well beyond what the standard three-knob layout allows.

The NYC USA is simpler and tighter. It has more high-mid definition and less of that fat low-end bloom. If you want the sound most records from the 90s were built on, the NYC is the reference. If you want that sound shaped and adapted to a modern rig, the BFGRMWB gives you the tools to do it.

Who It’s For

This is for guitarists who want the original Big Muff character without chasing down a vintage original or going deep into the variant rabbit hole. It works for grunge, alternative, shoegaze, heavy psych, and anything that needs a thick wall of fuzz behind it. I love the obnoxiously big box made from folded sheet metal. It’s cheap but rugged and just feels rock and roll when you’re on a stage and stomp on it.

If your fuzz goal is something more sculpted, more interactive with your picking, or more versatile across clean and dirty settings, look elsewhere. This pedal does one thing and does it well. Stomp it on, set your knobs, and let it rip.

Specs

  • Circuit: four-transistor fuzz with passive tone stack, original 1969 design by Mike Matthews and Bob Myer
  • Controls: Volume, Tone, Sustain
  • True bypass
  • Power: 9V DC, approx. 3mA current draw; also runs on a 9V battery
  • Enclosure: aluminum, made in New York City

Signal Chain

  • Epiphone SG Special with Lollar Firebird pickups (bridge pickup)
  • Big Muff NYC
  • Strymon Iridium (Chime)
  • Focusrite Scarlett 2i2
  • Garageband

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Where to Buy

Ehx Big Muff Nyc
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Get detailed specs on Electro Harmonix's website

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