{"type":"firestarter.listing","listing":{"id":"lst__bAf3Js_","product_name":"xDuoo MU-603 DAC Tube Preamplifier Bluetooth 5.1 Pre-amp","category":null,"description":"Features:-\n\n>Latest Bluetooth V5.1 connectivity.\n\n>Qualcomm QCC3034 Bluetooth chip.\n\n>High-resolution AptX HD wireless transmission codec.\n\n>High-quality 12AU7 Tube in pre-amp stage.\n\n>Premium ES9018K2M DAC chip.\n\n>Soft and smooth sound with Tube in pre-amp stage.\n\n>Aluminum shielded case.\n\n>High-gain Bluetooth antenna.\n\n>Analog RCA outputs.\n\nPresenting you the brand new xDuoo MU-603, an advanced Bluetooth DAC with Tube pre-amp. Explore new realms in your favorite music with the xDuoo MU-603. It has a Qualcomm QCC3034 Bluetooth chip that provides Bluetooth V5.1 connectivity with high-resolution AptX HD wireless transmission codec support. It benefits from the ES9018K2M DAC chip for providing crisp, detailed, noise-free sound decoding. Upgrade your desktop chain with the Bluetooth DAC.\n\nHigh-Resolution Bluetooth Connection Support:-\n\nxDuoo MU-603 adopts Qualcomm's QCC3034, a high-performance Bluetooth chip. It enables the latest Bluetooth V5.1 connectivity on the MU-603, users can connect their smartphone to the MU-603 via wireless Bluetooth connection and feed the audio signal directly from their smartphones. It has a high-resolution wireless transmission with AptX HD wireless codec support.\n\nOutstanding performance With Premium ESS Sabre DAC Chip:-\n\nSimilar to its brother MU-601, the latest MU-603 adopts ES9018K2M premium Sabre DAC chip for audio signal decoding. It ensures quality output with low THD+N distortion and high SNR ratio, you get to experience clean sound with no noticeable background hiss or noise.\n\nSmooth & Rich Sound With Tube Pre-Amp:-\n\nxDuoo MU-603 features a high-performance 12AU7 tube in the pre-amp stage that adds a touch of warmth, smoothness to the audio output. Experience a buttery smooth sound rich with details and a warm, punchy bass response with the xDuoo MU-603 in your HiFi desktop chain.\n\n\n","images":["https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mu-603-dac-tube-preamplifier-bluetooth-51-pre-amp-hifigo-334768.jpg?v=1655541221","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mu-603-dac-tube-preamplifier-bluetooth-51-pre-amp-hifigo-302559.jpg?v=1655275988","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mu-603-dac-tube-preamplifier-bluetooth-51-pre-amp-hifigo-984787.jpg?v=1655275988","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mu-603-dac-tube-preamplifier-bluetooth-51-pre-amp-hifigo-260646.jpg?v=1655275988","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mu-603-dac-tube-preamplifier-bluetooth-51-pre-amp-hifigo-830214.jpg?v=1655275988","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mu-603-dac-tube-preamplifier-bluetooth-51-pre-amp-hifigo-481207.jpg?v=1655275988","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-mu-603-dac-tube-preamplifier-bluetooth-51-pre-amp-hifigo-438211.jpg?v=1655275988"],"price":119,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:31.159Z"},"share_url":"https://firestarter.network/l/lst__bAf3Js_","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__bAf3Js_' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy xDuoo MU-603 DAC Tube Preamplifier Bluetooth 5.1 Pre-amp' and a budget_max comfortably above $119.00 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."]}}