{"type":"firestarter.listing","listing":{"id":"lst_fXr6teD1","product_name":"xDuoo MT-02 Hybrid Tube Headphone Amplifier","category":"Headphone Amp (Tube)","description":"Class-A hybrid tube amp\nThe MT-02 is a desktop hybrid tube headphone amplifier that combines dual 6J1 vacuum tubes with a transistor-based Class-A output stage for a balanced presentation of warmth, detail, and driving power. Designed for a wide range of headphones, it features both 4.4mm balanced and 6.35mm headphone outputs, adjustable gain, pre-out functionality, premium audio components, and a compact aluminum chassis with transparent acrylic panels that reveal the amplifier's internal architecture.\nHybrid tube-transistor design\nThe MT-02 uses a hybrid amplifier topology that pairs dual 6J1 tubes in the voltage gain stage with a transistor-based Class-A output stage. This design delivers the smooth tonal character and rich midrange associated with vacuum tubes while providing the current delivery and control needed to drive demanding headphones. \nDual 6J1 tube stage\nTwo 6J1 vacuum tubes work in the preamplification stage, contributing warmth, natural vocals, and smooth high frequencies. The tube stage helps preserve musical detail while creating a relaxed, fatigue-free listening character that complements both modern and classic recordings.\nClass-A output power\nThe transistor-based Class-A amplification stage provides up to 1,500mW into a 32Ω load, giving the MT-02 the ability to power everything from efficient portable headphones to higher-impedance designs. High current delivery, fast transient response, and controlled bass help maintain clarity across dynamic passages.\nBalanced and single-ended headphone outputs\nFront-panel 4.4mm balanced and 6.35mm single-ended headphone outputs provide compatibility with today's most common headphone connections. A selectable high and low gain switch makes it easier to match output levels with different headphone sensitivities.\nPre-out connectivity\nThe integrated pre-out allows the MT-02 to function as a tube preamplifier for external amplifiers or powered speakers. Volume remains synchronized through the front-panel contro","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/IMG_3654.jpg?v=1782491630","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/IMG_3664.jpg?v=1782491614","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/MT-02_PD_01.jpg?v=1782491351","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/MT-02_PD_02.jpg?v=1782491351","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/MT-02_PD_03.jpg?v=1782491364","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/MT-02_PD_04.jpg?v=1782491364","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/MT-02_PD_05.jpg?v=1782491351","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/MT-02_PD_06.jpg?v=1782491351","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/MT-02_PD_07.jpg?v=1782491351","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/MT-02_PD_08.jpg?v=1782491351","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/MT-02_PD_09.jpg?v=1782491351","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/MT-02_PD_10.jpg?v=1782491351","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/MT-02_PD_11.jpg?v=1782491351","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/MT-02_PD_12.jpg?v=1782491364","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/IMG_3649.jpg?v=1782491619"],"price":149,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-07-03T16:15:02.939Z"},"share_url":"https://firestarter.network/l/lst_fXr6teD1","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_fXr6teD1' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy xDuoo MT-02 Hybrid Tube Headphone Amplifier' and a budget_max comfortably above $149.00 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."]}}