Uploaded January 2026 | Updated September 2026, 2 weeks ago

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Cayin RU3 review
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I've finally found a portable DAC solution for audiophiles who demand serious power without breaking the bank. The Cayin RU3 is a small but mighty USB-C audio dongle capable of pushing up to an unbelievable 560mW in hyper mode from its 4.4mm balanced output. If you use hard-to-drive headphones or hungry planar magnetic cans like HiFiMan Arya, this HiFi dongle has the headroom you need. The sound is smooth and full-bodied, making it perfect for taming bright headphones and v-shaped IEMs. I compare its musicality to the technically strong Questyle M15C and discuss its incredible features, including the built-in 10-band EQ and DAC filters from the ES9069Q chip. While it has one small volume control quirk, the RU3 offers phenomenal value as an affordable DAC/AMP upgrade for your phone or computer.

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00:00 Cayin RU3 review
00:29 Design & features
02:47 Sound quality
07:18 Final pass

#CayinRU3 #USBCdongle #PortableDAC #HeadphoneAmp #Audiophile #HiFi #DACAMP #Headphones #IEMs #PlanarMagneticHeadphones #QuestyleM15C #DongleDAC #AudioReview #PassionForSound #CayinAudio #BudgetHiFi