{"type":"firestarter.listing","listing":{"id":"lst_apN04-I2","product_name":"SJY Horizon Closed Carbon Planar Magnetic Headphones","category":"Headphone","description":"Note: This product currently has a 1 week fulfillment time. Jeffrey, a one-man operation, is manufacturing and testing each pair of Horizon Closed Carbon himself.\n\nSound unbound\n\nDesigned and built in Houston, Texas, the Horizon Closed Carbon Headphones deliver a non-fatiguing, holographic sound with exceptional imaging and precise details. Made for audiophiles, music producers, and gamers needing image-perfect audio cues, the Horizon Closed Carbon combines the natural feel of open-back headphones with the noise isolation of a closed-back design.\nHand-made planar magnetic drivers\nJeffrey Yin of SJY Audio hand-builds each driver with the strongest-grade magnets and a full aluminum frame, minimally dampening the driver to guarantee a playful, engaging, and image-perfect sound experience. This setup delivers outstanding performance with crystal clear vocals and a balanced sound across the frequency range.\nCarbon fiber ear cups\nHand-casted from forged carbon fiber, the ear cups sport a unique “brushstroke” pattern and extreme durability. The matte finish—both scratch- and finger-print resistant—perfectly complements the subtle and strong CNC-machined aluminum frame.\nAll-day lightweight wearability \nBuilt with CNC aluminum construction yet weighing just a pound, the Horizon Closed Carbon offers a sturdy yet lightweight design.\nUltra-comfortable ear pads\nThe earpads feature an interior of memory foam that contours to your head. The outer layer combines perforated protein leather on the inside and non-perforated protein leather on the outside, while the front is made from breathable polyester to reduce heat for a cool and comfortable experience even during all-day use.\nFull-grain leather headband\nThe top strap is crafted from full-grain leather, chosen for its natural texture and softness, while the bottom strap features thicker full-grain leather with a heavier finish, for its wear resistance. Together, they form a two-layer construction, boasting long-lasting durability ","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42139241185516.png?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42133293564140.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42133293400300.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42133293367532.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42133293662444.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42133293498604.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42138253983980.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42133293695212.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42170524762348.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42170533216492.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42170541736172.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42138254016748.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42170198655212.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42170198556908.jpg?v=1776675722","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-horizon-closed-carbon-planar-magnetic-headphones-42170488750316.gif?v=1776675722"],"price":999,"currency":"USD","in_stock":true,"inventory_qty":59994,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:58.032Z"},"share_url":"https://firestarter.network/l/lst_apN04-I2","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_apN04-I2' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy SJY Horizon Closed Carbon Planar Magnetic Headphones' and a budget_max comfortably above $999.00 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."]}}