Up for sale is an Electro-Harmonix Op Amp Big Muff Pi Reissue, a faithful recreation of one of the most sought-after Big Muff circuits ever produced. Based on the late-'70s op-amp version made famous by players such as Billy Corgan, this pedal delivers the unmistakable massive fuzz, endless sustain, and powerful mid-focused character that helped define countless alternative rock and grunge records.

This example is in Excellent condition, having been very well looked after throughout its life. It presents beautifully with only the lightest signs of careful use and functions exactly as it should, ready to slot straight onto your pedalboard.

Unlike the classic transistor-based Big Muff circuits, the Op Amp version offers a tighter low end, a more aggressive attack, and a slightly more focused midrange, making it incredibly effective in a live band mix. From thick rhythm tones to soaring lead lines, the pedal delivers huge walls of saturated fuzz while retaining impressive clarity and note definition.

Faithful to the original vintage design, the reissue features the familiar three-knob layout for Volume, Tone, and Sustain, while also incorporating the highly practical Tone Bypass switch. Engaging this function removes the tone circuit from the signal path, producing a louder, more direct, and rawer voice that closely mirrors the original "Tone Wicker" style modification and opens up an entirely different sonic character.

Whether you're chasing the unmistakable fuzz tones of Siamese Dream, crafting expansive shoegaze soundscapes, or simply looking for a fuzz pedal with huge sustain and unmistakable attitude, the Op Amp Big Muff delivers in abundance. It responds beautifully to both single-coil and humbucker-equipped guitars and pairs exceptionally well with clean or already-driven amplifiers.

Built with Electro-Harmonix's renowned rugged construction, the Op Amp Big Muff Pi Reissue is designed to withstand years of rehearsals, studio sessions, and touring while continuing to deliver its unmistakable voice.

As with every new arrival that enters our store, this pedal has passed through the trusted hands of our on-site workshop team, where it has been thoroughly inspected and tested to ensure it is in tip-top shape for its new home and owner.

A fantastic Electro-Harmonix Op Amp Big Muff Pi Reissue in excellent condition. Capturing the unmistakable sound of one of the most revered Big Muff circuits ever produced, this pedal is an outstanding choice for players seeking crushing fuzz, singing sustain, and one of the defining tones of alternative rock.