{"type":"firestarter.listing","listing":{"id":"lst_jTHMPvmk","product_name":"Cayin RU7 Portable USB DAC & Headphone Amp Dongle","category":null,"description":" \n\nFeatures:-\n\n>Pure 1-Bit R2R Ladder DAC.\n\n>Parallel Driven Balanced Amplifier Chipset.\n\n>3.5mm+4.4mm Dual Headphone Output.\n\n>Supports Balanced Line-Out.\n\n>100-Level Resistor Array Volume Control.\n\n>Hi-Res PCM(32-Bit/384kHz), Native DSD256 Decoding.\n\n>All-to-DSD Function(64/128/256).\n\n>Detachable Type-C Connector Cable.\n\n>CNC-Machined Metallic Chassis.\n\n>Lightweight & Ergonomic Design.\n\n>High-Power Output(Up to 400mW, 4.4mm Bal).\n\n>Premium Leather Case.\n\n>0.96” OLED Display Screen.\n\n>Impressive Performance With Clear Dynamic Range & High SNR Performance.\n\n>Compact & Handy.\n\n>Works with Apple iOS, Android, Windows, and Mac devices.\n\n>Minimum Interferences with Dual PCB.=\n\nIntroducing the all-new Cayin RU7, a fully discrete 1-Bit R2R Portable USB DAC/AMP. Enjoy purely organic sound with ultimate details and rich, natural tone with the RU7 connected to your smartphone or tablet, or even laptop/PC. Cayin has equipped the RU7 with a fully-balanced resistors network discrete 1-bit DAC for pure DSD decoding support on the go. The RU7 even has an All-to-DSD function that allows to upscale your music to the DSD level!! It has dual-headphone outputs, 3.5mm single-ended, and 4.4mm balanced. With a properly designed balanced headphone amplification section, the RU7 produces a powerful output of up to 400mW on the go. Cayin RU7 also has line-out support with fixed voltage output!!\n\nFully-Discrete Pure 1-Bit R2R DAC:-\n\nCayin RU7 features a fully-discrete pure 1-Bit R2R ladder Array DAC. It features a micro-miniaturized 1-Bit DAC circuit formed using discrete components. It has a fully-differentiate 4-Ch DAC architecture with a total of 128(4x32) high-precision film resistors. It is similar to their recently launched N7 DAC. Cayin has implemented high-quality resistors to achieve 1-Bit DSD decoding.\n\nHigh-Power Parallel Driver Balanced Amplification Architecture:-\n\nCayin has featured dual amplifiers in parallel on th","images":["https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ru7-portable-usb-dac-headphone-amp-dongle-hifigo-128151.jpg?v=1685347711","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ru7-portable-usb-dac-headphone-amp-dongle-hifigo-305931.jpg?v=1685347805","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ru7-portable-usb-dac-headphone-amp-dongle-hifigo-864074.jpg?v=1685347779","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ru7-portable-usb-dac-headphone-amp-dongle-hifigo-220007.jpg?v=1685347761","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ru7-portable-usb-dac-headphone-amp-dongle-hifigo-695433.jpg?v=1685347809","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ru7-portable-usb-dac-headphone-amp-dongle-hifigo-cayin-ru7-191956.jpg?v=1685347758","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ru7-portable-usb-dac-headphone-amp-dongle-hifigo-629216.jpg?v=1685347795","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ru7-portable-usb-dac-headphone-amp-dongle-hifigo-565212.jpg?v=1685347786","https://cdn.shopify.com/s/files/1/0031/0453/8673/products/cayin-ru7-portable-usb-dac-headphone-amp-dongle-hifigo-475577.jpg?v=1685347783"],"price":289,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:30.466Z"},"share_url":"https://firestarter.network/l/lst_jTHMPvmk","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_jTHMPvmk' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Cayin RU7 Portable USB DAC & Headphone Amp Dongle' and a budget_max comfortably above $289.00 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."]}}