{"type":"firestarter.listing","listing":{"id":"lst_L7gD8GKx","product_name":"xDuoo MT-603 Tube Headphone Multiple Pre-Amplifier","category":null,"description":"Features:-\n\n>High-Quality 12AU7 Tube.\n\n>Four Aux Inputs.\n\n>One Aux Output.\n\n>Toneluck Push Button Switches.\n\n>Professional-grade Capacitors for Quality Performance.\n\n>Gold-Plated RCA Plugs.\n\n>Sandblasted Texture & Aluminum Alloy Chassis.\n\nTechnical Parameters:-\n\n>Frequency Response: 10Hz-40kHz.\n\n>THD+N: \n\n>SNR: 100dB.\n\n>Gain: 0dB.\n\n>Power Supply: DC12V/2A.\n\n>Dimensions: 12x7.8x4cm.\n\n>Weight: 0.36Kg.\n\nxDuoo MT-603 is the latest tube pre-amplifier featuring a high-quality 12AU7 tube. This pre-amplifier pairs well in your HiFi audio chain and adds a smooth, soft touch to the sound. It has multiple input options, you can connect up to 4 devices with the MT-603 at once. For output, it has a single line-out option. Bring home the tube presence and add a sweet, musical touch to your chain.\n\nPre-AMP Your Music With Smooth, Soft Tube Touch:-\n\nThe xDuoo MT-603 brings a soft, smooth tube touch to your music. It features a high-quality 12AU7 tube to add a touch of sweetness to our music, making it more musical and enjoyable.\n\nConnect Multiple Devices At Once:-\n\nxDuoo MT-603 can be connected to up to four devices at once. It features three RCA aux input ports on the back and a 3.5mm aux input at the front of the device. The active input can be easily switched using high-quality Toneluck switches on the front.\n\nSandblasted Aluminum-Alloy Chassis:-\n\nxDuoo MT-603 has a premium, sturdy build with sandblasted texture panel and a solid aluminum alloy chassis. It effectively prevents external signal interference providing the users with a clean output signal.\n\nPush-Button Toneluck Switches:-\n\nxDuoo has featured premium Toneluck push button switches on the MT-603. Toneluck is a well-known brand that manufactures switches and OEM parts for many world-famous brands in different categories. They are durable and have a rich feel to them.\n\n \n\n\n","images":["https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mt-603-balanced-tube-headphone-amplifier-hifigo-970855.jpg?v=1648538117","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mt-603-balanced-tube-headphone-amplifier-hifigo-800130.jpg?v=1648538117","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mt-603-balanced-tube-headphone-amplifier-hifigo-575360.jpg?v=1648538117","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mt-603-balanced-tube-headphone-amplifier-hifigo-376354.jpg?v=1648538117","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mt-603-balanced-tube-headphone-amplifier-hifigo-670727.jpg?v=1648538117","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mt-603-balanced-tube-headphone-amplifier-hifigo-425873.jpg?v=1648538117"],"price":109,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:31.269Z"},"share_url":"https://firestarter.network/l/lst_L7gD8GKx","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_L7gD8GKx' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy xDuoo MT-603 Tube Headphone Multiple Pre-Amplifier' and a budget_max comfortably above $109.00 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."]}}