https://www.amazon.com/FX-Audio-Optical-Coaxial-Amplifier/dp/B072JJT7SF/ref=sr_1_2?ie=UTF8&qid=1524049201&sr=8-2&keywords=fx-audio+dac-x6
review:
https://www.youtube.com/watch?v=17d5L5bcKvA
here is a great sounding USB DAC/AMP combo which will have 0 issues driving vast majority of headphones