We do not recommend connecting the RCA and XLR outputs simultaneously. Even if one output is not actively in use, the Harmony DAC will still detect it as a connected load, whether the unit is powered on or off. This additional load can impact overall sound quality. For the best performance, please connect only one output type at a time

All digital inputs on the Harmony DAC are treated equally by design. Each input is carefully implemented to ensure consistent performance and sound quality, regardless of the connection type. There is no single “best” input universally. We recommend trying the available inputs in your own system and choosing the one that best matches your source and personal listening preference. Different sources, cables, and system setups can subtly influence the final result, so trust your ears.