Offer Details

From a private, climate-controlled collection. This pedal has remained unused for over 15 years and has been exceptionally well preserved.Up for sale is a circa 1978 Electro-Harmonix Big Muff Pi, featuring the highly sought-after Tone Bypass V5 Op-Amp circuit with the original EH-3003 PCB.This is a correct, period-accurate late-1970s example, representing one of the most desirable and historically significant Big Muff variants.This pedal features the EH-3003 circuit board, which is directly tied to the late 1978 production run of Op-Amp Big Muffs.• The EH-3003 PCB is one of the final circuit revisions used in 1978 • Used in both V4 and V5 Op-Amp Big Muffs, including Tone Bypass versions • Represents the transition into cost-efficient op-amp designs replacing transistor circuitsIncludes the Tone Bypass switch (key feature of this era) • Removes the tone stack for a louder, more aggressive, mid-forward sound • Produces a noticeable volume boost (~6–7 dB) when engaged