Aerospace-Grade CNC Aluminum

Precision-crafted, elegant and portable: RU3 features a unibody CNC-milled chassis made from aerospace-grade aluminum alloy.

Its anodized surface forms a dense oxide layer that enhances both durability and metallic texture. The rear panel showcases laser-engraved detailing, creating subtle reflections under light.

Every curve and contour is crafted for a sleek, modern, minimalist aesthetic.

• Weight: 24 g
• Width: 25.4 mm
• Height: 60 mm
• Thickness: 11 mm

3.5 mm & 4.4 mm Phone / Line Output

Compact design, powerful performance: Despite its compact size, RU3 delivers outstanding output capability.

It includes 3.5 mm single-ended and 4.4 mm balanced phone outputs, with selectable high / low gain modes to match various headphone impedances.

Additionally, LO (Line Out) mode allows connection to external amplifiers, giving your setup the flexibility and power it deserves.

HYP / STD Dual Power Modes

Up to 560 mW power output: RU3 integrates a high-efficiency power management system with intelligent energy control, delivering high output while maintaining optimal efficiency.

Users can switch between HYP / STD modes to adjust output levels for different listening environments.

Its advanced regulation circuitry ensures stable, high-fidelity sound in both modes — completely free from USB power constraints.

• Hyper (HYP) Mode: Up to 560 mW of power output; effortlessly drives a wide range of headphones with full dynamics and clarity
• Standard (STD) Mode: Reduces power load on mobile devices; lowers consumption and heat for cooler, more efficient operation

Quad Balanced Drive Architecture

RU3 is built with two TI OPA1602 op-amps for high-precision I/V conversion and line driving, paired with two SGM8262 low-noise amplifiers to form a fully balanced quad-drive design.

In Hyper Mode, RU3 delivers greater output power and extended dynamic range while maintaining exceptional stability and tonal purity.

Distortion and noise are effectively minimized, ensuring accurate imaging, a wider soundstage, and a deeply immersive listening experience.

*Measured under Hyper Mode

ES9069Q DAC

High-performance audiophile-grade DAC: RU3 features a single ESS ES9069Q DAC with a dual-channel design, utilizing ESS’s latest HyperStream IV Dual DAC architecture and advanced SABRE HiFi technology.

It employs an independent op-amp architecture for left and right channels, ensuring precise signal processing and superior channel separation.

An independent LDO power system and low-phase-noise crystal oscillator further enhance performance, minimizing distortion and crosstalk.

The result is a wider soundstage, improved layering, and crystal-clear detail — revealing every nuance of your music with stunning clarity.

PCM 768 kHz & DSD512

Dual-core audio architecture for superior performance: RU3 is powered by the SPV5068 processor with a high-performance RISC-V dual-core audio architecture.

This design offers low latency, high compatibility, and outstanding energy efficiency, significantly reducing distortion and noise for a cleaner background and richer detail.

Supporting 32-bit / 768 kHz PCM and native DSD512, RU3 delivers high-resolution playback that meets the demands of true audiophiles.

High-Precision Lossless EQ

Unlock more ways to shape your sound: RU3 features a 10-band high-precision lossless EQ for in-depth sound customization.

Through the Cayin Control App, users can explore a wide range of adjustments to create a more expressive and engaging sound signature.

Multiple custom EQ profiles can be saved and recalled instantly, enabling truly tailor-made Hi-Fi experiences.

Cayin Control App

Smart connection | Easy setup | Total control: RU3 integrates seamlessly with the Cayin Control App, providing intuitive access to essential audio settings.

Easily adjust volume, output mode, channel balance, and digital filters, or choose from a variety of built-in EQ presets — even create custom EQ profiles to suit your personal preferences.

The app offers smooth, responsive control, allowing full customization of your listening experience — all from the palm of your hand.

Ongoing firmware updates will continue to introduce new features, ensuring a consistently fresh and enhanced user experience.

*Remote control via Cayin Control APP (Android version)

UAC 2.0 / 1.0 Support

Broader compatibility for more devices: RU3 offers seamless compatibility with Android, iOS, Windows, and macOS systems, allowing flexible switching between UAC 1.0 and UAC 2.0 modes.

Even in gaming setups, RU3 connects effortlessly to PS5, Nintendo Switch, and other consoles via UAC 1.0, letting you enjoy immersive gameplay enriched by Hi-Fi-grade audio.

0.96-Inch IPS Color Display

Customizable UI themes for a personalized experience: The 0.96-inch IPS color LCD provides clear visual feedback for decoding status and system settings.

Choose from four customizable UI themes to personalize your interface.

Responsive multifunction buttons ensure intuitive, precise control, while the clean UI delivers a smooth, fluid user experience.