{"type":"firestarter.listing","listing":{"id":"lst_Cul6R0mo","product_name":"Cayin Fantasy YD01 Single 10.3mm DD In-Ear Monitors IEM Earphone","category":"Earphone","description":"\n\n*The curve is measured by a third party and is for reference only.\n\nFeatures:-\n\n>10.3mm Dual-Cavity Two-Way Magnetic Structure Dynamic Driver Unit.\n\n>Beryllium-Plated Diaphragm Material.\n\n>Premium 316L Stainless Steel Earpieces.\n\n>Impedance: 37 Ohms.\n\n>Frequency Response: 20Hz-40kHz.\n\n>Sensitivity: 108dB@1kHz.\n\n>2-Pin 0.78mm Connectors.\n\n>Noise Isolation: 26dB.\n\n>Cable Type: 4 Conductors.\n\n>3.5mm Gold-Plated Termination plug.\n\n>Cable Length: 130cm.\n\nCayin Fantasy is an all-new flagship-grade single dynamic driver in-ear monitor featuring an advanced dual-cavity dynamic driver unit with stunning stainless steel ear shells.\n\nDual-Cavity Dynamic Driver:-\n\nTraditionally dynamic drivers have a single cavity design usually on the front. Cayin has specially designed a large 10.3mm dynamic driver unit with a dual-cavity design. There's a cavity on the front and another on the back of the dynamic driver unit. These dual-cavities have better air pressure management as compared to single-cavity drivers resulting in the swift movement of the diaphragm coil. This results in an overall smoother, low-distortion output for its users.\n\nLooks Like Gems:-\n\nThe ear shells in Fantasy look like jewelry from a fantasy world. They are made with ultimate craftsmanship with high-precision technologies giving them a smooth, premium finish. The cavities are made up of premium 316L stainless steel material.\n\nHigh-Quality Hybrid Cable:-\n\nCayin has bundled the Fantasy with a high-quality hybrid cable made with multiple cores of OCC copper and SPC copper materials. It has low internal resistance to the audio signal resulting in overall better acoustic performance.\n\nLow Power Requirement, Easy Driveability:-\n\nCayin Fantasy has got a low impedance rating of just 37 ohms with high sensitivity rating of 108dB. It can be powered easily using smartphones but using a Hi-res player is recommended for best performance.\n","images":["https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-fantasy-yd01-single-dd-in-ear-monitors-iem-earphone-hifigo-981651.jpg?v=1618476630","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-fantasy-yd01-single-dd-in-ear-monitors-iem-earphone-hifigo-956902.jpg?v=1618476625"],"price":399,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:31.432Z"},"share_url":"https://firestarter.network/l/lst_Cul6R0mo","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_Cul6R0mo' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Cayin Fantasy YD01 Single 10.3mm DD In-Ear Monitors IEM Earphone' and a budget_max comfortably above $399.00 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."]}}