{"product_id":"cayin-ru7-amp-dac-used","title":"Cayin RU7 DAC\/Amp Dongle - Mint - Verified by HiFiLoop","description":"\u003cdiv\u003e\n\u003ch2\u003eThe Audiophile's Hook\u003c\/h2\u003e\n\u003cp\u003eThe Cayin RU7 is a rare breed in the dongle world: a fully discrete 1-bit DAC design built for musical flow, density, and realism—without the “clinical” edge many compact DACs can bring. This is a Mint (99% new) full-set unit, delivering flagship-style tone and drive for less than new pricing.\u003c\/p\u003e\n\u003ch2\u003eCondition Report (The Truth)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eMint \/ Collector Quality:\u003c\/strong\u003e Like new with minimal handling marks, ideal for clean desk setups and everyday carry.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNo obvious cosmetic defects observed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMandatory:\u003c\/strong\u003e The device has passed all functional tests.\u003c\/p\u003e\n\u003ch2\u003eSonic Signature \u0026amp; Pairing\u003c\/h2\u003e\n\u003cp\u003eRU7 is designed around Cayin’s discrete 1-bit approach and “All-to-DSD” processing, aiming for a smooth, organic presentation with strong micro-dynamics and an effortless sense of flow. With both 3.5mm and 4.4mm outputs, it’s an easy match for sensitive IEMs and many portable headphones, especially when you want more body and texture on the go.\u003c\/p\u003e\n\u003cp\u003eTo unleash the full potential of this device, we recommend pairing it with gear from our \u003ca href=\"\/collections\/headphones\"\u003eHeadphones Collection\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eTechnical Highlights (Mobile-Table)\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eDAC Architecture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eDiscrete 1-bit resistor network design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eHi-Res Support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003ePCM up to 384kHz; Native DSD64–DSD256\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eAll-to-DSD Modes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eSelectable DSD64 \/ DSD128 \/ DSD256 conversion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eOutputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e3.5mm single-ended + 4.4mm balanced; line-out supported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eOutput Power (@32Ω)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003eUp to 400mW (4.4mm) \/ 160mW (3.5mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eVolume Control\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e100-step discrete resistor volume (3 segments)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eSize \/ Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #eee;\"\u003e66 × 24 × 12 mm; 25 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCayin RU7 dongle DAC\/amp\u003c\/li\u003e\n\u003cli\u003eFull original retail set (box + original accessories)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Buy Used from HiFiLoop?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e✅ 14-Day DOA: Full refund\/replace if dead on arrival.\u003c\/li\u003e\n\u003cli\u003e🔧 180-Day Warranty: Free repair service (buyer pays return shipping).\u003c\/li\u003e\n\u003cli\u003e🔬 Lab Tested: I\/O, noise floor, channel balance verified.\u003c\/li\u003e\n\u003cli\u003e📦 Free Shipping: On orders over $199.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSee full Grading Scale in Footer Condition Guide.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCTA:\u003c\/strong\u003e Missed this? Contact “Help Me Find Gear”.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"HiFiLoop","offers":[{"title":"Default Title","offer_id":47614240751830,"sku":null,"price":129.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/7445\/9862\/files\/Used_Cayin_RU7_DAC_Amp_dongle_in_Mint_condition_-_product_photo.jpg?v=1765952465","url":"https:\/\/www.hifiloop.com\/products\/cayin-ru7-amp-dac-used","provider":"HiFiLoop","version":"1.0","type":"link"}