TechPowerUp checked out the FiiO Q7 Portable Desktop-Class DAC/Amplifier
A quote from the article:
FiiO bridges the gap between portable DAC/amps and desktop sources with the new Q7, using desktop hardware in a smaller form factor. It manages to pack in everything you can think of including buttons, knobs, and even a screen in addition to extensive I/O connectivity, desktop and mobile support, with lots of power off both battery and DC modes.FiiO Q7 Portable Desktop-Class DAC/Amplifier Review