{"type":"firestarter.listing","listing":{"id":"lst_vHOeSN7_","product_name":"Apos x Passion for Sound Lydian Desktop Headphone Amplifier","category":"Headphone DAC/Amp","description":"Note: Throw your email in the form above to stay notified of updates on this product. The images depict the amplifier prototype and do not reflect the final product. It is currently housed in an off-the-shelf case. The inputs and outputs of the final product will match those of the prototype.\nComing soon: Apos x Passion for Sound headphone Desktop amplifier\nWe’ve been working closely with Lachlan from Passion for Sound for months on the Lydian Amplifier. If you follow Lachlan, you know that he's always been about sound first. He's a lifelong audiophile who listens carefully, critiques incisively, and shares his love for music openly with his viewers. The goal was to turn his \"passion for sound\" into a literal product: a fully-discrete amplifier voiced for clarity, space, and rich musicality. \nFully-discrete circuit derived from a higher-end design\nThis is a fully-discrete design based on a circuit approach used in far more expensive multi-thousand-dollar components. Discrete amplification offers tighter control over device selection and operating points than an all-in-one chip solution.\nTransparent, spacious, engaging\nThe Lydian is all about \"lifting the veil\" and letting you hear things you've never heard before: micro-dynamics, reverb tails, and precise instrument spacing. It boasts a spacious, detailed presentation that's musical and engaging. \nWide-range versatility for headphones\nThe Lydian is designed to behave predictably across a wide load range. It delivers 1.8 W RMS into 32 ohms and 780 mW RMS into both 100 ohm and 300 ohm loads, which gives it enough headroom for demanding headphones without running near its limits. \nExtra inputs for swapping sources\nMultiple inputs let you keep more than one DAC connected, like a delta-sigma DAC for incisive detail and an R2R DAC for gooey tonality. It also makes it easy to insert a tube preamp without redoing your whole chain. \nProduct highlights\n\nDesigned for maximum sound quality at the price\n\nExtra analog inputs for ","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-apos-headphone-dac-amp-apos-x-passion-for-sound-lydian-desktop-headphone-amplifier-1212968916.jpg?v=1766528557","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-apos-headphone-dac-amp-apos-x-passion-for-sound-lydian-desktop-headphone-amplifier-1212968915.jpg?v=1766528437"],"price":500,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:56.687Z"},"share_url":"https://firestarter.network/l/lst_vHOeSN7_","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_vHOeSN7_' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Apos x Passion for Sound Lydian Desktop Headphone Amplifier' and a budget_max comfortably above $500.00 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."]}}