{"product_id":"3-leaf-proton","title":"3 leaf Proton Envelope Filter - Matte Black Oxide","description":"\u003ch3 data-start=\"150\" data-end=\"191\"\u003e3 Leaf Audio Proton MK4 – Matte Black\u003c\/h3\u003e\n\u003ch4 data-start=\"193\" data-end=\"220\"\u003eThe Altitude Summary\u003c\/h4\u003e\n\u003cp data-start=\"221\" data-end=\"691\"\u003eThis U.S.-made Proton MK4 envelope filter, hand-built in Seattle, WA between 2020 and 2025, is in excellent condition with only light scratching on the bottom—nothing visible once it’s on your board. Fully functional and gloriously expressive, this filter is an instant creativity booster. With true bypass and refined circuitry, it delivers all the envelope snap, sweep, and funk you could ever want. A fun, musical pedal that rewards nuance and lets your tone breathe.\u003c\/p\u003e\n\u003ch4 data-start=\"693\" data-end=\"729\"\u003eTouch-Sensitive Funk in a Box\u003c\/h4\u003e\n\u003cp data-start=\"730\" data-end=\"958\"\u003eThe Proton MK4 is engineered for feel. Dig in and get rich, vocal sweeps—or back off for more subtle motion. It nails the envelope filter sound with a balance of warmth and punch, always reacting with player sensitivity in mind.\u003c\/p\u003e\n\u003ch4 data-start=\"960\" data-end=\"993\"\u003eUpdated for Modern Players\u003c\/h4\u003e\n\u003cp data-start=\"994\" data-end=\"1209\"\u003eThis fourth-gen version features improved headroom, reduced noise, and enhanced responsiveness. Whether you're running passive bass, hot pickups, or synths, it keeps up effortlessly without flattening your dynamics.\u003c\/p\u003e\n\u003ch4 data-start=\"1211\" data-end=\"1245\"\u003eBuilt for Boards and Stages\u003c\/h4\u003e\n\u003cp data-start=\"1246\" data-end=\"1463\"\u003eWrapped in a tough matte black enclosure, this Proton MK4 is sleek and sturdy. True bypass means your core tone stays intact when the filter’s off, and the small footprint makes it a perfect fit for tight pedalboards.\u003c\/p\u003e\n\u003ch4 data-start=\"1465\" data-end=\"1484\"\u003eKey Features\u003c\/h4\u003e\n\u003cp data-start=\"1485\" data-end=\"1750\"\u003e• Made in Seattle, USA\u003cbr data-start=\"1507\" data-end=\"1510\"\u003e• Production years: 2020–2025\u003cbr data-start=\"1539\" data-end=\"1542\"\u003e• Matte Black finish\u003cbr data-start=\"1562\" data-end=\"1565\"\u003e• Fourth-generation Proton circuit\u003cbr data-start=\"1599\" data-end=\"1602\"\u003e• Dynamic, responsive envelope filter\u003cbr data-start=\"1639\" data-end=\"1642\"\u003e• Improved headroom and noise performance\u003cbr data-start=\"1683\" data-end=\"1686\"\u003e• True bypass switching\u003cbr data-start=\"1709\" data-end=\"1712\"\u003e• Minor cosmetic wear on bottom only\u003c\/p\u003e","brand":"3 Leaf Audio","offers":[{"title":"Default Title","offer_id":50617645662504,"sku":"3LEAF-PROTON","price":500.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/4225\/2328\/files\/3Leaf_Proton-Photoroom.jpg?v=1757025727","url":"https:\/\/altitudeguitar.myshopify.com\/products\/3-leaf-proton","provider":"Altitude Guitar","version":"1.0","type":"link"}