Sweet. But dang honestly I have to resort to using my FiiO E12 Mont Blanc as a sort of extra amp from the headphone out of the DAC X6.
DAC-X6 is a great deal but, when I switch from my FiiO portable amp attached to low Mw output android phone to PC... it just does not compare to the FiiO power. Even with bass boost off on the portable amp.
When going to play songs and other audio on my PC straight to DAC-X6 (from usb or optical) and attach any of my headphones and be like "what the crap?" Big power deficiency! so then I augment it with my FiiO.... But yes stand alone it is great. Especially for easy to drive headphones --- but even then I (to my ears) notice the lack of power output as to the stated specs.
I may get the MonoPrice amp/dac and see if that one lives up to the specs so I can do a side by side comparison of that and the DAC-X6.
:TL;DR
It does amp but not as it loud as expected in the specifications of product description.