Earthquaker Devices Fuzz Master General


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

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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 knob.


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. Do not run at higher voltages! Current Draw is
about 10ma.

This product is covered by a limited lifetime manufacturer warranty.

Although we are not authorised to determine if any repair is covered under warranty, if the item was purchased through World of Music, then we are often the best people to facilitate the claim for you and will do so as timely as possible. Warranty does not apply to cosmetic damage or faults that are a result of user neglect. Although your mate is really handy with a soldering iron, any product modification or home repair will also result in a void warranty.

Quite often, something perceived as a fault is as simple as a faulty cable or power issue so we always suggest checking over Frequently Asked Questions on the manufacturer website first. It can be a helpful approach to getting to the bottom of a problem and save you a lot of time in getting your gear back up and running!

This item ships via Australia Post; fully insured for your piece of mind. Orders require a signature on delivery and we suggest using an address where someone will be present for the speediest delivery time. For delivery attempts where no one is present, your order will be taken to your allocated Australia Post location for pickup. A card will be left with instructions of where and when you can collect your order.