The K5PRO is a compact, desktop DAC/headphone amp combo by FiiO. It features the leading AK4493 DAC chip with a wide variety of inputs and outputs to create a great value proposition.
AudioQuest DragonFly Cobalt
DragonFly Cobalt, our new flagship DAC, takes what music lovers around the world have come to expect from the multi-award-winning DragonFly family—naturally beautiful, seductive sound—and strips away fuzz and fog that weren't even noticeable until Cobalt removed them.
32 bit / 768 kHz
24 bit / 96 kHz
ESS ES9038Q2M 32 bit with minimum-phase slow roll-off filter for more natural sound
Audio Science Review
In that regard, and in the context of a budget product that is designed reasonably well, I am going to recommend the Fiio K5 Pro.
mansr, Audiophile Style
As the poor distortion figures of the Cobalt show, even a high-end chip can be compromised by the specifics of the implementation.