{"type":"firestarter.listing","listing":{"id":"lst_MJ29s6aU","product_name":"FiiO FA19 10 Knowles BA Driver In-Ear Earphones","category":null,"description":"\n*The curve is measured by a third party and is for reference only.\n\nFeatures:-\n\n>Flagship All-BA IEMs.\n\n>10 High-Performance BA Drivers from Knowles.\n\n>Custom Knowles Enhanced Bass Drivers.\n\n>Negative Feedback Bass Enhancement System.\n\n>Clean, Coherent Sound With Mid-Frequency Notch Filter.\n\n>Rubycon Audiophile-Grade Film Capacitor Crossover.\n\n>DLP 3D Printed Ear Shells.\n\n>Two-Way Tuning Switch(Monitor/HiFi Tunings).\n\n>S.Turbo Patented Acoustic Design.\n\n>High-End 8-Strand High-Purity Silver Cable.\n\n>Straight Twist-Lock Swappable Termination Plugs(3.5mm+4.4mm).\n\n>Expanded MMCX Connectors.\n\n>Carefully Tuned For True Hi-Res Sound Reproduction.\n\n>Hi-Res Audio Certified.\n\nTechnical Information:-\n\n>Impedance: 10Ω@1kHz.\n\n>Sensitivity: 106dB/Vrms.\n\n>Frequency Response Range: 20Hz-40kHz.\n\n>Cable Length: 1.2m.\n\n>Weight: Approx 7grams(per unit).\n\nFiiO FA19 is the brand new flagship set from the house of FiiO. Equipped with 10 high-performance BA drivers from Knowles, the FiiO FA19 packs a wonderful sound performance. The pair features specially developed negative feedback bass enhancement technology and also has a mid-frequency notch filter for enhanced sound reproduction. FiiO FA19 incorporates FiiO’s patented S.Turbo Acoustic turbine-shaped design for enhanced comfort and great low-end punch. The pair has a premium and exquisite build crafted using high-precision DLP 3D-printing technology. It also has a two-way tuning switch that will help you choose between Monitoring or HiFi modes. Experience an enriching sound with exquisite details and comfort with the all-new FiiO FA19.\n\nRediscover Your Music With Premium 10BA Driver Design:-\n\nFiiO FA19 is designed with proper research and development by an experienced team of acoustic engineers. As the brand’s current flagship with All-BA setup, the FA19 adopts 10 high-performance balanced armature drivers. We have 4 custom-developed Knowles BA drivers for a rich bass response,","images":["https://cdn.shopify.com/s/files/1/0031/0453/8673/files/fiio-fa19-10-knowles-ba-driver-in-ear-earphones-hifigo-566502.jpg?v=1716513432","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/fiio-fa19-10-knowles-ba-driver-in-ear-earphones-hifigo-628565.jpg?v=1716513432","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/fiio-fa19-10-knowles-ba-driver-in-ear-earphones-hifigo-fa19-136961.jpg?v=1715918694","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/fiio-fa19-10-knowles-ba-driver-in-ear-earphones-hifigo-255761.jpg?v=1716297959","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/fiio-fa19-10-knowles-ba-driver-in-ear-earphones-hifigo-722294.jpg?v=1716297994","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/fiio-fa19-10-knowles-ba-driver-in-ear-earphones-hifigo-796287.jpg?v=1715918661","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/fiio-fa19-10-knowles-ba-driver-in-ear-earphones-hifigo-811303.png?v=1715918711","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/fiio-fa19-10-knowles-ba-driver-in-ear-earphones-hifigo-753682.jpg?v=1716297932","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/fiio-fa19-10-knowles-ba-driver-in-ear-earphones-hifigo-242870.jpg?v=1716298053"],"price":999.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:29.945Z"},"share_url":"https://firestarter.network/l/lst_MJ29s6aU","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 ","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_MJ29s6aU' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy FiiO FA19 10 Knowles BA Driver In-Ear Earphones' and a budget_max comfortably above $999.99 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."]}}