{"type":"firestarter.listing","listing":{"id":"lst_QPJ7poIZ","product_name":"FiiO FT7 Planar Magnetic Open-Back Headphones","category":"Headphone","description":"ULTRA-THIN DIAPHRAGM\nAfter two years of independent research and development, FiiO has created a leading-class 1um ultra-thin diaphragm. The difference between even a 2um and 1um diaphragm thickness results in noticeable performance differences. Exceptionally lightweight, the FT7's diaphragm responds with lightning-quick speed. It faithfully reproduces subtle sounds in the ultra-high frequency range and provides exceptional dynamic range.\nPOWERFUL MAGNETIC ARCHITECTURE\nThanks to FiiO’s patented uniform magnetic field design, the FT7’s magnetic field is significantly expanded, enhancing the sensitivity of its large 106mm planar driver while also reducing overall driver weight for improved wearing comfort.\nAt the core of the FT7 is a dual-sided push-pull magnetic circuit system, utilizing a total of 18 high-performance N52 neodymium magnets (9 per side) with a powerful magnetic flux of up to 1.5T. This robust magnetic structure delivers ample energy reserves for lightning-fast transient response and deeply textured, controlled bass.\nPROPRIETARY DRIVER TECHNOLOGY\nThe FT7 employs FiiO's self-developed planar driver technology, a patented multi-layer coating system. The driver uses high-performance PET as the diaphragm substrate and selectively applies 24K gold and pure silver to create a multi-layer coated driver. Leveraging the advantages of both precious materials allows the FT7 to have highly detailed, charmingly rich sound.\nLIQUID NITROGEN FROZEN HIGH-PURITY CABLE\nCrafted expressly for the FT7, this bespoke cable pairs over-6N OCC mono-crystalline copper with a week-long cryogenic nitrogen treatment that relieves internal stress, tightens crystal boundaries, and boosts conductivity for ultra-clean signal flow. A low-dielectric PFA insulator (ε = 2.1) preserves the copper’s resolution while subtly enriching mids and lows, adding just the right touch of warmth for an effortlessly engaging listen.\nCOMFORT AND QUALITY\nThe FiiO FT7 has a premium and exquisite build quali","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-headphone-fiio-ft7-planar-magnetic-open-back-headphones-1227075013.jpg?v=1774635668","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-headphone-fiio-ft7-planar-magnetic-open-back-headphones-1227075012.jpg?v=1774635608","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-headphone-fiio-ft7-planar-magnetic-open-back-headphones-1227075011.jpg?v=1774635548"],"price":699.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:55.895Z"},"share_url":"https://firestarter.network/l/lst_QPJ7poIZ","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_QPJ7poIZ' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy FiiO FT7 Planar Magnetic Open-Back Headphones' and a budget_max comfortably above $699.99 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."]}}