Cayin RU9 – Tube charm and modern precision in your pocket

The Cayin RU9 features the Nutube 6P1 tube. This compact DAC supports both unbalanced 3.5 mm and balanced 4.4 mm PO/LO outputs, giving you the flexibility to drive your preferred headphones or speakers. A key highlight is the ability to switch between tube and solid-state operation, ensuring a personalised sound tailored to your listening habits.

Three timbre modes: Classic, Modern and Solid State

• Classic: No global feedback; local feedback only. This results in higher total harmonic distortion (THD) and a warm, nostalgic tube sound.
• Modern: Global negative feedback defines overall gain. THD is significantly reduced, yielding a cleaner, quieter background while retaining tube warmth for a sweet, clear and delicate modern tube signature.
• Solid State: Carefully tuned op-amp ICs and matching circuits provide a neutral tonality, fast transients and highly precise reproduction – ideal for those who prefer an uncoloured presentation.

Versatile applications

At home, at the office or on the move, the RU9 easily pairs with smartphones, computers, digital audio players, tablets and even gaming consoles – a great choice for anyone looking to elevate their audio experience.

Dual AKM DACs & 16-core XMOS processor

Inside are two AKM AK4493SEQ DACs running in mono mode for outstanding channel separation and reduced crosstalk – a key advantage for immersive listening. The 16-core XMOS XU316 represents the latest generation of USB-audio solutions, delivering impressive digital signal processing and top-tier audio quality.

Modern Bluetooth transmission & USB compatibility

The advanced Qualcomm QCC5125 platform enables high-resolution Bluetooth. LDAC and other HD streaming formats are supported, so you can enjoy top-quality music without cables. With UAC1.0 (driverless) and UAC2.0 support, wide device compatibility is ensured.

S/PDIF input/output

An integrated S/PDIF in/out allows easy connection to other digital audio devices, helping you get the most from your source – whether streaming music or playing video games. The RU9 delivers clear, detailed sound.

Compact and lightweight

Dimensions: 100 × 70 × 15 mm • Weight: 150 g.

Your perfect companion for audiophile moments

Combining classic tube technology with state-of-the-art digital processing, the Cayin RU9 takes your listening to the next level – at home or on the go. Discover the RU9’s sonic range and experience music in its purest form.