Cayin RU3 - Premium USB Audio Dongle

Display, USB-DAC
Ratings
BrandMore from Cayin
Delivered Wed, 15.7.
Only 4 pieces in stock at third-party supplier
Supplied by
free shipping

Colour3

Product details

The RU3 - Premium USB Audio Dongle from Cayin is a compact and powerful solution for music lovers who value high-quality sound. This DAC/headphone amplifier has been specifically designed for mobile use, bringing Cayin's signature Hi-Fi sound into a portable format. With a sleek aluminum housing, the RU3 combines modern decoding technologies with user-friendly control features. The powerful ESS ES9069Q DAC chip ensures clear and natural sound reproduction, while the quad-balanced drive architecture provides impressive dynamics and low distortion. The RU3 is not only suitable for use with earbuds and portable headphones but is also compatible with various operating systems, making it a versatile choice for audiophile users.

  • High-performance ESS ES9069Q DAC for clear sound reproduction
  • Quad-balanced amplifier structure for a wide dynamic range
  • Independent op-amp design for detailed playback
  • Compatible with iOS, Android, Windows, and Mac OS
  • Sleek and robust aluminum housing.

Key specifications

Scope of application
HiFi, Portable
Power supply
USB power delivery

General information

Item number
65208755
Manufacturer
Cayin
Category
Headphone amplifiers
Release date
18.11.2025

Colour

Colour
Violet
Exact colour description
Violet

Headphone amplifier properties

Scope of application
HiFi, Portable
Headphone Amplifier Features
Display, USB-DAC

Audio properties

signal-to-noise ratio
117 dB
distortion factor
0%
Sample rate
768 kHz
Audio resolution
32 bits
Number of sound levels
100x

Connections

Audio inputs
USB-C

Power supply

Power supply
USB power delivery

Voluntary climate contribution

CO₂ emissions
1.27 kg
Climate contribution
CHF 0.11

Scope of delivery

Scope of delivery
Short manual, USB-C interconnect cable

Product dimensions

Length
60 mm
Width
25.40 mm
Height
11 mm
Weight
24 g

30-day right of return
24 Months Warranty (Bring-in)

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «Headphone amplifiers» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • Cayin
    Not enough data
  • 1.Behringer
    0.3 %
  • 1.Fosi Audio
    0.3 %
  • 3.Mackie
    1 %
  • 4.iFi Audio
    2.7 %

Warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Digitec Galaxus
  • Cayin
    Not enough data
  • 1.FiiO
    0 days
  • 2.iFi Audio
    5 days
  • Behringer
    Not enough data
  • Fosi Audio
    Not enough data

Return rate

How often is a product of this brand in the «Headphone amplifiers» category returned?

Source: Digitec Galaxus
  • Cayin
    Not enough data
  • 1.Mackie
    0.6 %
  • 2.Fosi Audio
    6.3 %
  • 3.FiiO
    6.8 %
  • 4.iFi Audio
    9.5 %
Source: Digitec Galaxus