I don't have the E12 but I am going to assume it is one step above the E11K. But then again people be comparing the E11K to the O2 amp which is quite a statement. I did compare my ICAN head to head with the C5 last night only to support my initial thoughts on the sonics of the C5.
======== The C5 sonic abilities continue to amaze. It sounds very much identical to the ICAN with a little bit more bass emphasis but so far as clarity, resolution, detail, staging, immersiveness, power, workmanship, 3Dness,zero noise floor with every iem and headphone, And overall coolness factor. I would say both are about equal..Now I would give the slight edge to the ICAN as it literally has zero flaws to my ears and has more gain settings and 2 very powerful eq settings in the bass boosts and 3D enhance that work very well. But the C5 being portable is shockingly similar with it's own powerful room filling sound and abilities.
Lets just say as good as the E12 and E11K are for the bang for your money Fiio amps are I am going to doubt they are at the same level of sound as the ICAN. I certainly know the E11K isn't. (great little portable amp I might add however it is clearly outclassed by the C5) The E12DIY edition should come close but not so much their cheaper siblings.
Edited by Dsnuts - 8/19/14 at 6:24am