{"type":"firestarter.listing","listing":{"id":"lst_MGIRtCzX","product_name":"Cayin N3Ultra Triple Timbre Digital Audio Player","category":"DAP (Digital Audio Player)","description":"Cayin N3Ultra digital audio player\nThe Cayin N3Ultra is a portable digital audio player built around dual AKM DACs, a Gen3 vacuum tube audio circuit, and a fully-customized Android-based system focused on local playback. It combines solid-state and tube timbres, balanced and single-ended outputs, and practical power for everyday listening at home or on the move. Designed to work equally well as a standalone player, USB DAC, or digital transport, N3Ultra fits naturally into a listening routine that moves between headphones, IEMs, and external amplifiers.\nDual AKM DAC architecture\nThe N3Ultra uses two AK4493S DAC chips operating in mono mode, dedicating one DAC to each channel. This fully differential design reduces crosstalk and improves channel separation, helping preserve spatial cues and low-level detail. Independent analog circuits for left and right channels support cleaner signal handling from conversion through output.\nSelectable tube and solid-state timbres\nA Gen3 vacuum tube audio circuit built around Raytheon JAN6418 NOS tubes allows you to choose between Classic tube, Modern tube, and solid-state timbres. Each mode adjusts circuit behavior rather than applying digital coloration, letting you tailor tonal character based on headphones, music library, or listening environment.\nBalanced and single-ended outputs\nThe player offers both 3.5mm single-ended and 4.4mm balanced headphone outputs, each supporting tube and solid-state operation. Balanced output delivers up to 600mW at 32Ω, providing enough headroom for demanding portable headphones while remaining quiet with sensitive IEMs.\nPrecision volume control\nVolume adjustment is handled by a JRC NJW1195A four-channel electronic volume controller, a design commonly used in preamplifiers. This approach maintains channel balance at low listening levels and reduces noise compared to conventional digital attenuation.\nLow-jitter clocking and signal control\nTwo Accusilicon AS318 femtosecond oscillators provide clock s","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552266.jpg?v=1768943769","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552265.jpg?v=1768943709","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552264.jpg?v=1768943648","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552263.jpg?v=1768943589","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552262.jpg?v=1768943528","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552261.jpg?v=1768943469","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552260.jpg?v=1768943408","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552259.jpg?v=1768943348","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552258.jpg?v=1768943289","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552257.jpg?v=1768943229","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552256.jpg?v=1768943167","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552255.jpg?v=1768943108","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552254.jpg?v=1768943049","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552253.jpg?v=1768942988","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552252.jpg?v=1768942929","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552251.jpg?v=1768942867","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552250.jpg?v=1768942807","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217552249.jpg?v=1768942748","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-cayin-dap-digital-audio-player-cayin-n3ultra-triple-timbre-digital-audio-player-1217607704.jpg?v=1768962009"],"price":529,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:56.111Z"},"share_url":"https://firestarter.network/l/lst_MGIRtCzX","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_MGIRtCzX' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Cayin N3Ultra Triple Timbre Digital Audio Player' and a budget_max comfortably above $529.00 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."]}}