Update on the Schiit Fulla 2. Nice little amp dac, really good sound quality and handling my 6xx nice. They sound nice at max volume, but when compared to 598, the 598 were sounding funny, kind of distorted. The only problem I faced so far is that I was playing GTA V for couple of hours and the schiit goes mute often. I have to pull out the usb cable and re plug it. seems to be a driver problem. but I am not sure if its the schiitty driver or the windows because I run insider preview and it acts funny with many other devices too.
for the price, and when compared to the Creative E1 that I have, this schiit is highly recommended. btw, I tested it with ATH M50x, HD598 and HD6xx.