Electro-Harmonix Germanium 4 Big Muff Pi Distortion / Overdrive Pedal

Distortion/Fuzz Pedal with Bias and Volts Controls
Electro-Harmonix Germanium 4 Big Muff Pi Distortion / Overdrive Pedal image 1
Electro-Harmonix Germanium 4 Big Muff Pi Distortion / Overdrive Pedal image 1
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Electro-Harmonix Germanium 4 Big Muff Pi Distortion / Overdrive Pedal
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The Ultimate Do-all Distortion Pedal? It Just Might Be!

The Germanium 4 Big Muff Pi stacks the fuzzy bite of a Big Muff on top of an overdrive circuit to give Muff fans what might be the most flexible Muff yet. Using a quartet of Germanium transistors (two for each side), the Germanium 4 Big Muff Pi conjures any kind of distortion from mild to wild. The four transistors are just part of the magic though, as you have access to unique controls such as Bias and Volts, which lets you fine-tune the distortion sound and add character. The Germanium 4 Big Muff Pi is one amazing stompbox!

Electro-Harmonix Germanium 4 Big Muff Pi Distortion/Fuzz Pedal Features at a Glance:
  • Individual overdrive and distortion with the ability to stack them together
  • 4 individual Germanium Transistors
  • Each mode of drive mode uses its own 2 Germanium stack
  • Overdrive and distortion can be stacked utilizing four germanium transistors
  • Bias and tone control define the tonality in overdrive
  • Volts and Bias define the way the distortion will react
  • Starving battery sound through volts control adds character
  • Battery equipped with optional 9.6DC-200 power supply
Go Muff-crazy with the Germanium 4 Big Muff Pi distortion/fuzz pedal!

Tech Specs

Pedal Type Distortion/Overdrive
Inputs 1 x Instrument
Outputs 1 x 1/4"
Batteries 1 x 9V
Height 3.2"
Width 11.2"
Depth 6.2"
Weight 2 lbs.
Power Supply Included No
Manufacturer Part Number G4BM

Customer Reviews

Based on 11 reviews
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Great fuzz

Quite possibly the best overdrive and/or distortion pedal I've ever heard. We tested with a Epiphone Les Paul Special with '59 style pickups that coil split, a 1986 Ibanez Pro Line with a hot bridge humbucker through a 120w Crate 1x12 and a Epiphone Valve Jr with a Celestion Ten 30 and a Princeton preamp circuit. Both guitars, all the pickup combinations, and both amps sounded incredible when hit with this pedal. We added a Behringer Reverb Machine after the Germanium 4 Big Muff Pi and ran through the effects loop of a L.R. Baggs Venue preamp. This only improved the experience. We could dial anything from clean boost to full on fuzzed out distortion using either the overdrive side, the distortion side, or both. Both reviewers agree, quite possibly the best bang for the buck in distortion pedals. Any guitar/ amp combination works well and music style that needs a good boost to an all out distortion party will benefit. Lastly, the small tube amp is 5w and has a gain circuit. We set gain and volume to about 2 and still had great tone that you could talk over in a 10' x 12' room. Great for practice/ rehearsals.
Music background: 35 year hobbyist

Love that Sound

Nothing like that Germanium sound just what I wanted

Great pedal! Solid build!

This pedal is amazing and with the slightest turn of a knob it changes into another awesome sound. I've had for about a month now and I still haven't explored many of the settings, but I haven't found any bad settings. I play mostly with les paul through fender super champ x2 (with 10" celestion) and i use the overdrive to push my amp hard and then stack distortion side on top to really blow away anything I want. Feels like I got a 3-4 channel amp now.

big muff pi

great smooth sounding overdrive, and being able to lower the volts on the distortion side really brings out the classic big muff sound!
Music background: part time musician

Germanium 4

everything i want in a fuzz
Music background: guitar player
See also: Distortion Pedals, Electro-Harmonix, Electro-Harmonix Distortion, Overdrive, Boost & Fuzz