[The µDAC-HD] caught me by surprise with its amazingly smooth, natural, and musical delivery. It doesn’t try to impress you with coloration but maintains its tonal integrity across all genres of music. I regret not auditioning this wonderful DAC/headphone amp earlier. Admittedly, I gravitated towards and spent most of my listening sessions with the Wyred 4 Sound uDAC-HD. It’s just a pleasure to listen to with no glaring faults.... I could listen to this DAC for hours and never get fatigued or overwhelmed. The other two have the tendency to do that after some time.... Very analog sounding, no artifacts, even in USB mode. Most liquid of any portable DAC I’ve ever used.