{"type":"firestarter.listing","listing":{"id":"lst_hfvGIWj3","product_name":"xDuoo TA-01B 12AU7 Tubes AMP High Performance HIFI USB DAC Tube","category":"Tube Amplifier","description":"\n\nProduct description:\n\n\n \n\n\nMULTI-FUNCTIONAL COMPACT TUBE AMPLIFIER\n\n\n12AU7, the much-praised tube welcomed by super fans is usedas the preamp.The post-amp uses a high quality transistor toamplify the power, enough to push any higher low impedance headphones or earphones. A  12V adapter is used as the power supply, which greatly reduces the size and  weight of the tube amp. It's very appropriate to use at home or the office. Simply connecting to PC or any other players and you'll get high quality music.\n \n\nXMOS U8 MORE STABLE AND FASTER\n\nThe USB digital receiver chip applies an XMOS U8 chip in asynchronous transmission mode supporting digital audio of 32bit/192kHz and DSD128.The DAC part applies 2 Cirrus Logic chips CS4398.\n\n\n\nSUPPORTS ASIO, KS AND WASAPI MODES\n\nSupports ASIO, KS and WASAPI modes and greatly reduces the delay and distortion.\n\n\n\nTWO HIGH QUALITY CRYSTAL OSCILLATORS\n\nTwo high quality crystal oscillators are used as the clock power source respectively working in 44.4k and 48k frequency and their multifold sampling rates. The mode is automatically switched by the system guaranteeing that the local clocks do not intervene with each other and are able to work independently.\n\n\n\n12AU7 TUBES TRANSISTOR BUF STRUCTURE\n\nIt applies 12AU7 tubes + transistor BUF structure. The combination creates the audio with both grace and sense of strength.\n\n\n\n\n\nSpecifications:\n\n\n\nPower Supply: DC12V/2A\n\nSystems Applicable: Win XP, Win2000/Win7, Win8 and Win10(driver is needed) Apple Mac OS X system (no need to install driver)\n\nSupported Sampling:16-32Bit/44.1-192KHz, DSD64-128\n\nOutput Power: 2100mW ( 32Ω Load )\n\nFrequency Response: 10Hz~ 100KHz (±0.5dB)\n\nTHD+N: 0.03% (1KHz) \n\nS/N: 110dB\n\nSuitable Headphone Impedance: 16Ω~600Ω\n\nWeight: 410g\n\nGain: +17 dB\n\n\nSize: 140* 80*82mm\n\n\n\n\n \n\n\n","images":["https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-ta-01b-12au7-tubes-amp-high-performance-hifi-usb-dac-tube-tube-amplifier-hifigo-263851.jpg?v=1655540837","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-ta-01b-12au7-tubes-amp-high-performance-hifi-usb-dac-tube-hifigo-164579.jpg?v=1655276073","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-ta-01b-12au7-tubes-amp-high-performance-hifi-usb-dac-tube-hifigo-846117.jpg?v=1655276073","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/xduoo-ta-01b-12au7-tubes-amp-high-performance-hifi-usb-dac-tube-tube-amplifier-hifigo-931956.jpg?v=1655276073"],"price":179,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:31.900Z"},"share_url":"https://firestarter.network/l/lst_hfvGIWj3","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_hfvGIWj3' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy xDuoo TA-01B 12AU7 Tubes AMP High Performance HIFI USB DAC Tube' and a budget_max comfortably above $179.00 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."]}}