Mobile Audiophile Sound: Introducing the Cayin RU3 DAC/Headphone Amplifier
By HiFi Editorial8 February 2026
Key Highlights
The Cayin RU3 is a compact mobile DAC/headphone amplifier, measuring 6 cm in length and 2.5 cm in width, weighing 24 grams.
It features the ESS ES9069Q DAC chip with HyperStream-IV-Dual architecture, supporting PCM up to 768 kHz and DSD512 formats.
Connectivity includes USB-C for UAC1.0 and UAC2.0, alongside 3.5mm and 4.4mm headphone outputs for versatile compatibility.
