Cayin RU7 1-Bit Resistor Network Portable DAC

Cayin RU7 discrete 1-bit dongle DAC The Cayin RU7 is an ultra-portable USB-C dongle DAC built around a fully discrete 1-bit resistor network. It combines native DSD decoding, balanced and single-ended headphone outputs, and a hardware resistor ladder volume control in a compact metal chassis. Designed for phones, tablets, and computers, the RU7 delivers precise digital-to-analog conversion without relying on an integrated DAC chip. Discrete 1-bit resistor ladder DAC The RU7 uses a fully-balanced discrete 1-bit DAC built from 128 high-precision thin-film resistors rather than an off-the-shelf DAC chip. Incoming audio is converted to a DSD bitstream and processed through four parallel 1-bit DAC channels. This architecture prioritizes timing accuracy and low noise, helping preserve fine detail and stable channel balance during playback. User-selectable all-to-DSD processing All incoming digital audio can be converted to DSD64, DSD128, or DSD256 before reaching the DAC stage. PCM is suppor