{"type":"firestarter.listing","listing":{"id":"lst_nzWMsbnv","product_name":"EHX by JHS – BIG MUFF 2","category":"FUZZ / DISTORTION","description":"For 50 years, a forgotten schematic sat buried in dust and time – a concept waiting to be born. Now, its moment has come. The EHX Dual Op-Amp Big Muff 2 is here, delivering a completely new Big Muff voice unlike anything you’ve heard before.\n\nTHE PAST &amp; PRESENT\n\nIn 2021, while on a research trip that led to the creation of the book Made On Earth For Rising Stars: The Electro-Harmonix Story, we had the privilege of digging through decades of materials, memorabilia, devices, and prototypes in the workshop of Bob Myer, the inventor of the EHX Big Muff. It was there we discovered it: a loose sheet of paper with a hand-drawn schematic labeled “BIG MUFF USING (2 DUAL OP AMPS)”.\nThis wasn’t just another circuit. It was Bob Myer’s own attempt to reimagine the original transistorized Big Muff circuit using the new cutting-edge Op-Amp technology that had emerged later in the 1970s.\nFor nearly 50 years, this “Lost Big Muff” design sat forgotten in his notebooks — until now.  We found it. We built it. And have brought it to life.\n\n\nWHAT MAKES THE BIG MUFF 2 DIFFERENT?\n\nOnce discovered, we breadboarded the circuit exactly as Bob drew it, and immediately knew we had something worth making.  We found that Bob’s design is unique when compared to the now famous late 70s Op-Amp Big Muff designed by Michael Abrams. Different clipping arrangement, an extra gain stage and various other elements that made this lost version extremely special. \nWhere the original Big Muff delivers that iconic \"sweet violin-like sustain,\" Bob's two dual Op-Amp approach pushes into more aggressive, cutting territory. It's the Big Muff DNA with a sharper edge, more volume, and the most pronounced low-end and midrange of any EHX Big Muff ever. It expresses Bob's vision of aggressive sustain and cutting presence, with the familiar Big Muff control layout you know and love.  It’s the sound of what almost was.\nMike Matthews himself, after hearing our prototype, admitted it had \"something special\" even though ","images":["https://cdn.shopify.com/s/files/1/0610/7122/9028/files/Big-Muff-2-RED_r1.png?v=1772036379","https://cdn.shopify.com/s/files/1/0610/7122/9028/files/Big-Muff-2-RED-QL_r1.png?v=1772036379","https://cdn.shopify.com/s/files/1/0610/7122/9028/files/BigMuff2-201524-Edit-Chord.jpg?v=1772036379","https://cdn.shopify.com/s/files/1/0610/7122/9028/files/BigMuff2-201527.jpg?v=1772036379","https://cdn.shopify.com/s/files/1/0610/7122/9028/files/BigMuff2-201863.jpg?v=1772036379","https://cdn.shopify.com/s/files/1/0610/7122/9028/files/Big-Muff-2-RED-QR_r1.png?v=1772036379","https://cdn.shopify.com/s/files/1/0610/7122/9028/files/BigMuff2-201899.jpg?v=1772036379","https://cdn.shopify.com/s/files/1/0610/7122/9028/files/BigMuff2-201825_2887e47f-9f5b-4dcd-928e-d596027e5a0d.jpg?v=1772036379","https://cdn.shopify.com/s/files/1/0610/7122/9028/files/BigMuff2-201875_4401b186-d9fc-4b0f-a688-9f14168e6af3.jpg?v=1772036379"],"price":249,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T14:56:09.144Z"},"share_url":"https://firestarter.network/l/lst_nzWMsbnv","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_nzWMsbnv' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy EHX by JHS – BIG MUFF 2' and a budget_max comfortably above $249.00 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}