EarthQuaker Devices Fuzz Master General

Maker: EarthQuaker Devices

Model: Fuzz Master General

Condition: New 



The Fuzz Master General is our take on the vintage Ace Tone Fuzz Master FM-2 Professional fuzz machine, an octave fuzz that was very similar to the wildly popular Super Fuzz. We have taken the basic circuit and re-imagineered it to be more useful for the modern player. The Fuzz Master General features a more accurate Fuzz control that delivers a much broader spectrum of dirt tones ranging from nearly clean through full buzz saw assault. We added a “Voice” toggle to further enhance your dirt desires and wrangle a more variable tone out of the classic circuit. This toggle selects between germanium, silicon and no diode clipping. This has a huge impact on the characteristics of fuzz tone, upper octave clarity and output level. Germanium diodes offer more output and an open, looser fuzz tone while the silicon diodes compress the signal and yield a tighter fuzz tone. When the voice is set to no diode clipping (center position) you can attain a nearly clean upper octave that boarders on ring modulation! While the original Fuzz Master had a foot switch to select between two different tone settings, The Fuzz Master General has a variable tone control that allows you to dial in anything from a wide open treble assault to a super-scooped, bass heavy blast. It also has significantly more output volume and a much lower noise floor than the original, vintage unit. With all these added features, the Fuzz Master General delivers a more versatile version of the original while still retaining the same swelling octave grind we all know and love. Each Fuzz Master General is made by human hands in mostly tropical Akron, Ohio.


Fuzz: Turning this control clockwise creates more dirt.

Tone: Darker and scooped tones clockwise. Brighter and more open tones counter-clockwise

Level: Adjusts the output volume. 

Voice: Three way toggle switch which selects the clipping style:

  • Mode 1 - Germanium clipping. This produces a more open and looser fuzz.
  • Mode 2 - Silicon clipping. This produces a tigher, more compressed fuzz. 
  • Mode 3 - Open, pure transistor drive. This produces a nearly clean octave-up effect and creates a sound very similar to ring modulation.

CAUTION! Mode 3 is very loud; turn down the level when using this mode.To get the best octave effect, use the neck pickup and play above the 12th fret. This is an analog octave so single notes work best but full chords produce an awesome, destructive sound! 


4 5/8″ x 2 1/2″ x 2.25″ with knobs


A standard 9 volt DC power supply intended for musical instruments with a negative center 2.1mm barrel or a 9v battery. Do not use any generic adapter (anything from RadioShack or similar). Do not run at higher voltages! Current Draw is about 10ma.

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