Embeds Dual AK4493SEQ DAC Chips For Exceptional Channel Separation

Cayin RU9 features a sophisticated dual DAC architecture utilising two AK4493SEQ DAC chips in mono mode configuration. This fully differential output design ensures each channel is processed independently, resulting in exceptional channel separation and minimal crosstalk for superior audio performance.

Features An Exceptional 4-Channel Balanced Amplification Circuit For Hi-Fi Audio

Cayin RU9 features an advanced 4-channel balanced amplification circuit, where the audio signal passes through a balanced headphone amplifier utilising two ultra-low-noise Texas Instruments OPA1662 op-amps and four Nexperia power transistors, resulting in exceptional signal stability and minimal interference for superior audio performance.

Fused With Gen5 3-Stage Amplification Architecture For Accurate Audio Output

Stage 1: JFET Buffer Amplifier Built with low-noise 2SK209 JFETS optimised for buffering. Stage 2: Nutube Voltage Amplifier Powered by Nutube 6P1, this stage delivers voltage gain while defining the RU9's unique tube timbres. Stage 3: Buffer Driver Selected 2SK209 JFET transistors are employed to create a high-performance source-load circuit. Significantly enhanced the current driving capability of the tube timbre circuit.

Equips XU316 Processor, Anti-Vibration System & Other Components For Enhanced Performance

Cayin RU9 showcases cutting-edge technology with its XMOS XU316 processor, featuring a 16-core 32-bit RISC architecture that supports native DSD512 and PCM 32bit/768kHz playback. Its innovative design includes a custom-engineered anti-vibration system for the Nutube tube, complete with FPC flexible PCB, silicone damping sleeve, and pin suspension system to eliminate interference. When operating in DC Mode, the device automatically activates Hyper Mode, enhancing the amplifier's performance by increasing quiescent current and operating voltage for superior clarity, wider soundstage, and more dynamic punch.

Features Three Distinct Timbre Modes: Classic Tube, Modern Tube and Solid-State

Classic Tube Timbre Without NFB circuitry, stages work independently with local feedback determining overall gain. This creates classic tube amplifier distortion with higher THD, resulting in more thermal noise and richer tube-like sound. Modern Tube Timbre A large-loop NFB circuit will determine the total gain. By incorporating NFB over multiple amplification stages, the THD will be reduced significantly. The harmonic distortion characteristics and sound signature lean more towards a modern style, with greatly reduced thermal noise and a slightly cleaner tube sound. Solid-state Timbre Built with op-amps and precision-tuned peripheral circuits. Delivers accurate resolution, fast dynamics, and neutral tonality.

Features 3 Versatile Power Modes & Supports QC3.0 and PD2.0 Fast Charging

Cayin RU9 features three versatile power modes for optimal performance in any situation. When connected via USB, it operates in Dongle Mode for portable use. With the power adapter connected, users can choose between Battery Mode, which uses USB power with battery backup, or DC Mode, which enables direct power delivery and automatically activates Hyper Mode for maximum performance. The device supports QC3.0 and PD2.0 fast charging protocols for convenient power management.

Equips Magnetic Attachment System & Premium Accessories For Universal Compatibility

Cayin RU9 features a thoughtfully designed magnetic attachment system that seamlessly connects to smartphones and tablets. The package includes a premium magnetic leather case with precise cutouts and integrated backing for secure, stylish protection, along with a high-quality L-shaped USB interconnect cable featuring shielded, tightly braided construction to minimise signal loss. For Android users, a magnetic adaptor ring ensures universal compatibility.

Features Multiple Outputs & Wireless Connectivity For Seamless Pairing

Cayin RU9 offers exceptional versatility with dual audio outputs featuring 3.5mm and 4.4mm connections, each with 3-stage gain and output level control. The device supports comprehensive digital audio protocols, including S/PDIF input/output and USB Audio DAC (with UAC1.0 and UAC2.0 compatibility, including driver-free mode for gaming consoles). Enhanced by Bluetooth 5.1 technology powered by Qualcomm QCC5125, it supports premium audio codecs including LDAC, aptX HD, aptX Adaptive, AAC, and SBC for superior wireless audio transmission.

Features A User-Friendly Design With Premium Controls & High-Quality Display

Yellow - 44.1kHz/48kHz Green - 88.2kHz/96kHz Dark Blue - 176.4kHz/192kHz Purple - 352.8kHz/384kHz Light Blue - 705.6kHz/768kHz White - DSD64/DSD128/DSD256/DSD512 Red - Charging indicator

Crafted With Aluminium Chassis & Optimal Heat Dissipation & Offers Portability

Cayin RU9 embodies elegance in a remarkably compact form factor, weighing just 150g with a slim 15mm profile. Its unibody CNC-machined aluminium chassis showcases meticulous craftsmanship through precision polishing, while an advanced thermal-conductive structure ensures optimal heat dissipation for sustained high performance. This thoughtful design makes the RU9 exceptionally portable and comfortable for extended use, perfect for audiophiles on the move.