Hey there. I currently own the Beyerdynamic DT-990 Pros and i drive them with the Fiio E18 (or Audioengine D1 when at Desktop). I love these headphones, however I am not a fan of the highs when listening to rock/metal or even sometimes when listening to Soundtracks (classic).   I am...

I currently own the Audioengine D1 which i bought with my A5+ on my desktop. A couple of months ago I bought the DT 990 pros which i love.   However, now i am looking for a portable headphone amp, since the D1's have no such features.   First I was thinking Fiio E11 then (because I use a...