I deleted my previous post, saying that the HiFimeDIY U2 is warmer than the DF, but I now realize that this is not true so I take it back. The U2 initially gives the feeling of being warmer and "tubier" but this sound is not accurate, in fact it rolls off the highs and mids too much. Now that I listen to the DF through the wyrd I get enough warmth and bass and the mids and highs remain neutral. this is definitely more accurate. The DF is much better dac than the U2 for sure.
I guess listening to my Grado 325's all week,getting huge midbass, and suddenly coming back to the HD800 was a sharp transition for me and I blamed it on the poor DF
. when getting used to the HD800 sound,there is plenty of bass and warmth.
But nevertheless I am sure thinking about upgrading the DF soon, although very good sounding for the price and size, this is not an endgame for me.