Kiats
Headphoneus Supremus
Do you know if minibox really has a different kind of sound vs, balanced card. Do you think its worth getting the IEM card because I have higher end headphones and earphone?
The iem card is very refined and has good sense of space for iems. I like it because the gain is not so great and so offers me more control over volume. I'm not sure if it can drive other than easy to drive cans like the Grados.
As for the minibox, it is a little powerhouse that drives my AKG cans nicely, and even the HD 800, Beyer T1 and the HE-6 (though the last not optimally). Here, the soundstage and headroom is good and you get more details or richer sound.
Hope that helps!