{"product_id":"open-box-electro-harmonix-op-amp-big-muff-pi-fuzz","title":"Open Box - Electro-Harmonix Op-Amp Big Muff Pi Fuzz","description":"\u003cp\u003e🚚 \u003cstrong\u003eFAST \u0026amp; FREE SHIPPING from Phoenix, AZ!\u003c\/strong\u003e \u003cstrong\u003eProfessor Nigel's is an authorized Electro-Harmonix dealer.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cb\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThis unit is in \u003cstrong\u003eOpen Box -\u003c\/strong\u003e \u003cstrong\u003eMint\u003c\/strong\u003e condition with all original packaging. This was a lightly used shop demo pedal. Fully tested and covered by the full manufacturer’s warranty.\u003c\/p\u003e\n\u003ch3\u003eProfessor’s Notes\u003c\/h3\u003e\n\u003cp\u003eThe Op-Amp Big Muff Pi recreates the \u003cstrong\u003elate-’70s “IC” Muff circuit\u003c\/strong\u003e made famous by Billy Corgan on \u003cem\u003eSiamese Dream\u003c\/em\u003e. It’s punchier and more aggressive than transistor-based Muffs, offering a distinctive fuzz character that stands out in a mix — all in a compact, affordable package.\u003c\/p\u003e\n\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe Electro-Harmonix Op-Amp Big Muff Pi Distortion\/Sustainer is a faithful reissue of the original late-1970s op-amp-driven Big Muff, long prized by collectors for its unique sound. Unlike traditional transistor-based Muffs, the op-amp design delivers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore attack and clarity\u003c\/strong\u003e in the midrange.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTighter low end\u003c\/strong\u003e with less “wooliness.”\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive sustain\u003c\/strong\u003e that cuts through dense mixes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eControls for \u003cstrong\u003eVolume, Tone, and Sustain\u003c\/strong\u003e keep operation simple, while a \u003cstrong\u003eTone bypass switch\u003c\/strong\u003e allows players to lift the tone circuit entirely for extra raw output and presence.\u003c\/p\u003e\n\u003cp\u003eCompared to vintage units — now scarce and expensive — the reissue brings the same iconic fuzz at a fraction of the cost, with modern reliability and a pedalboard-friendly size. Whether chasing Billy Corgan’s Pumpkins-era sound or just looking for a more articulate Muff, the Op-Amp Big Muff Pi delivers.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Analog fuzz\/distortion pedal (op-amp circuit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControls:\u003c\/strong\u003e Volume, Tone, Sustain, Tone Bypass switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBypass:\u003c\/strong\u003e True Bypass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio:\u003c\/strong\u003e Mono input\/output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 9V battery included or optional 9VDC power supply (not included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Draw:\u003c\/strong\u003e ~3mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 4.75\" x 4\" x 2.25\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eElectro-Harmonix Op-Amp Big Muff Pi pedal\u003c\/li\u003e\n\u003cli\u003e9V battery (installed)\u003c\/li\u003e\n\u003cli\u003eOriginal packaging\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Electro-Harmonix","offers":[{"title":"Default Title","offer_id":53068365496640,"sku":null,"price":84.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/6486\/0736\/files\/IMG_9945.jpg?v=1787690124","url":"https:\/\/professornigels.com\/products\/open-box-electro-harmonix-op-amp-big-muff-pi-fuzz","provider":"Professor Nigel's","version":"1.0","type":"link"}