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Version 3 (Late 1970’s)
Around 1977 the graphics changed to the now iconic, bold red and black design that the Big Muff is most associated with. This version 3 of the Big Muff also gained an AC power adaptor jack, a first for the Big Muff.
All V3 circuit boards were marked with the number 3003 and a stylized “EH” symbol, with an identical circuit trace pattern to the V2. The component values, while much more consistent than V1 and V2 Big Muffs, varied slightly from unit to unit, with at least six variants being identified.