Cayin RU7 Portable USB DAC and Headphone Amplifier with 1-Bit DSD Conversion, Balanced Output and OLED Display

The Cayin RU7 is a portable USB DAC and headphone amplifier built around fully balanced resistor networks and discrete 1-bit DSD conversion. Its USB-C audio input feeds shared headphone and line-output connectors in 3.5mm single-ended and 4.4mm balanced formats. An OLED display and dedicated volume and mode controls provide convenient access to settings.

Key Features

• Discrete 1-bit DSD DAC with fully balanced resistor networks.
• PCM input from 44.1kHz to 384kHz and native DSD64, DSD128 and DSD256.
• User-selectable all-to-DSD conversion at DSD64, DSD128 or DSD256.
• Shared 3.5mm single-ended and 4.4mm balanced headphone/line-output connectors.
• 0.96-inch, 128 × 64 OLED display with volume and mode controls.
• CNC aluminum chassis with a listed net weight of approximately 25g.
• Shielded USB-C cable, USB-A to USB-C adapter and leather case included.

Specifications

• Model: Cayin RU7. Input: USB Type-C audio.
• Headphone power ratings: 160mW at 32 ohms through 3.5mm; 400mW at 32 ohms through 4.4mm balanced.
• Headphone frequency response: 20Hz–42kHz, ±0.5dB, for PCM-to-DSD256 operation.
• Output impedance: 0.5 ohm single-ended; 1.0 ohm balanced.
• Fixed line output: 1.2Vrms single-ended or 2.4Vrms balanced, specified at 1kHz into 10k ohms.
• Dimensions: 66 × 24 × 12mm.
• For Windows-based USB DAC use, install the custom Cayin USB audio driver from the manufacturer's support page.
• There is no power switch. Disconnect the DAC from the audio source after use to avoid continuing to draw from the source battery.