{"type":"firestarter.listing","listing":{"id":"lst_rfOP3pl4","product_name":"xDuoo XD05T","category":"AMP & DAC","description":"\n\n\nClassic Sound with Carefully Selected Vintage Tubes\nTubes still hold a special place in audio amplifiers, and the XD05T takes full advantage of that with two miniature tubes from the 1960s. These carefully selected, meticulously paired vintage tubes add a touch of even-order harmonics, delivering a soft, warm sound full of emotional depth. Since these rare tubes are no longer in production, they bring a unique, classic \"analog\" feel that becomes even more precious with time.\n\n\nThe Timeless Warmth and Precision of Tube Amplifiers\nWhen tube amplifiers operate in high-voltage environments, they generate even-order harmonics based on the original signal. These harmonics, combined with the fundamental frequencies and higher-frequency harmonics, create a fuller and richer sound, delivering a pleasant and immersive listening experience. In contrast, odd-order harmonics can cause discomfort, but tube amplifiers naturally produce fewer of these. This harmonic structure, combined with their dynamic range and micro-detail performance, allows tube amplifiers to excel at capturing subtle musical nuances. Their inherent warmth softens the sound, making them particularly enjoyable for classical music, jazz, vocals, and more. Once a hallmark of high-end audio, vacuum tube amplifiers remain beloved for their distinct, nostalgic sound quality.\n\n\n\nHybrid Circuit\nxDuoo recognizes the crucial role of the preamplifier in shaping overall sound quality. To highlight the distinctive \"tube sound,\" xDuoo integrates a vacuum tube into the preamplifier stage. For enhanced driving power, transistors are employed in the current amplification stage, delivering robust output. When driving 300-ohm headphones, the power reaches up to 556mW, fully unlocking the potential of high-impedance headphones. This hybrid design, combining vacuum tubes and transistors, enables the amplifier to preserve the warm tonal character of tubes while benefiting from the resolution and stable output of transistors, of","images":["https://cdn.shopify.com/s/files/1/0040/7201/3924/files/9_cc08f4cc-de3a-43ea-a18f-c5da990a267a.png?v=1729230864","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/1_8c2e4d52-6c07-48d4-90a1-3bb37ca8fb31.png?v=1729230864","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/2_6de33754-62b2-4450-b4e5-5fd9089b1b38.png?v=1729230864","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/8_c365fde2-2e7e-4d83-9b7a-9df62e593d1a.png?v=1729230864","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/3_2ff36494-6611-409a-b121-c2f5d1328e4e.png?v=1729230864","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/4_b333d653-2000-4f3e-9f5d-5a0271fb3794.png?v=1729230864","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/5_2e03b8c0-1ecb-4554-a2ff-c3312cd4fab6.png?v=1729230864","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/6_ceaf5e8b-387c-4faf-a44a-0ae4dc32e5fc.png?v=1729230864","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/7_649ee0a6-8548-40ae-80ee-7abe76fad797.png?v=1729230864"],"price":549,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:45.731Z"},"share_url":"https://firestarter.network/l/lst_rfOP3pl4","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_rfOP3pl4' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy xDuoo XD05T' and a budget_max comfortably above $549.00 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."]}}