iFi introduced the Uno headphone DAC amplifier as a pure entry-level computer model

The Uno receives both power and input signal simultaneously from a PC, Mac or smartphone. The heart of the novelty is the ES9219MQ / Q chip from ESS Lab and a specialized (according to iFi) crystal clock oscillator. Together with Quad DAC+ and Time Domain Jitter Eliminator technologies, it is able to "deliver ultra-low distortion, superb clarity and impressive dynamic range."

more at: ifi Audio