{"type":"firestarter.listing","listing":{"id":"lst_3nk_J72b","product_name":"FiiO K11 R2R Balanced Desktop DAC/Amp","category":"Headphone DAC/Amp","description":"True R2R sound for under $200\nExperience a new dimension of audio fidelity with the FiiO K11 R2R Balanced Desktop DAC/Amp. Designed for audiophiles who crave authentic sound, this DAC/Amp is packed with advanced features that bring your music to life. From its fully differential true 24bit R2R DAC to its customizable RGB lighting, the K11 R2R offers a totally immersive listening experience.\nFully differential true 24-bit R2R DAC resistor arrays\nThe K11 R2R features FIIO's self-developed four-channel fully differential 24bit R2R DAC. Each channel consists of 48 precision thin-film resistor arrays, totaling 192 resistors with 0.1% tolerance and low temperature drift (30ppm). This meticulous configuration delivers a unique and charming sound, capturing every nuance of your favorite tracks.\nDual NOS/OS modes\n\n\nNOS (Non-Oversampling) Mode: Preserves the original sampling rate for decoding—maintaining the authentic sound of your music.\n\n\nOS (Oversampling) Mode: Upsamples to a high sampling rate of 384kHz, providing superior audio performance with even more refined, clear sound.\n\n\nTrue 24-bit decoding\nSupporting PCM 384kHz/24bit and DSD256 decoding, the K11 R2R can easily handle high-precision audio signals. This ensures that you hear every detail, providing an excellent audio experience. *DSD256 requires setting the DSD output mode to Native on the source device, internally converting to PCM before being decoded by the R2R resistor arrays.\nNJW1195A high-quality electronic volume control\nThe K11 R2R uses the NJW1195A, a 4-channel electronic volume controller. This resistor ladder electronic potentiometer offers low distortion and low noise, allowing for precise volume adjustment, ensuring your audio is always at the perfect level.\n3 gain levels + 3 independent volume curves\nWith three independent gain levels and volume curves, the K11 R2R adapts to various types of headphones, whether you're using sensitive earphones or harder-to-drive over-ear headphones. This customizati","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-headphone-dac-amp-fiio-k11-r2r-balanced-desktop-dac-amp-41335180198124.png?v=1741110988","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-headphone-dac-amp-fiio-k11-r2r-balanced-desktop-dac-amp-41335180361964.png?v=1774349900","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-headphone-dac-amp-fiio-k11-r2r-balanced-desktop-dac-amp-41335180394732.png?v=1774349900","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-headphone-dac-amp-fiio-k11-r2r-balanced-desktop-dac-amp-41335180263660.png?v=1774349900","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-headphone-dac-amp-fiio-k11-r2r-balanced-desktop-dac-amp-41335180427500.png?v=1774349900","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-headphone-dac-amp-fiio-k11-r2r-balanced-desktop-dac-amp-41335180329196.png?v=1774349900","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-headphone-dac-amp-fiio-k11-r2r-balanced-desktop-dac-amp-41335180230892.png?v=1774349900","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-fiio-headphone-dac-amp-fiio-k11-r2r-balanced-desktop-dac-amp-41335180296428.png?v=1774349900"],"price":175.99,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:58.223Z"},"share_url":"https://firestarter.network/l/lst_3nk_J72b","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_3nk_J72b' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy FiiO K11 R2R Balanced Desktop DAC/Amp' and a budget_max comfortably above $175.99 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."]}}