Experience the pure magic of discrete R-2R in your pocket with the Cayin RU6 – the world’s first truly portable R-2R USB DAC/AMP that delivers the legendary warm, rich and effortlessly natural signature of ladder DACs.

Hand-crafted 24-bit resistor-ladder network, 99-step relay-based hardware volume, selectable OS/NOS modes and up to 213 mW of clean balanced power make RU6 the ultimate companion for anyone craving authentic, fatigue-free Hi-Fi sound on the go.

• DAC Architecture: Fully discrete 24-bit R-2R resistor ladder (internally developed)
• Hardware Volume: 99-step relay-controlled resistor network – perfect channel balance
• Supported Formats: PCM up to 384 kHz, native DSD64–DSD256
• Modes: Oversampling (OS) / Non-Oversampling (NOS)
• Balanced Output (4.4 mm): 213 mW @ 32 Ω
• Single-Ended Output (3.5 mm): 138 mW @ 32 Ω
• Output Impedance: 0.5 Ω (SE) / 1.0 Ω (BAL) – drives even the most sensitive IEMs cleanly
• Gain Switch: Low / High for perfect headphone matching
• Connection: USB-C input, fully OS-independent volume control