The unit has poor dynamic range (music is cluttered and congested). The bass is bloated and the upper-mids/lower treble is emphasized where it is fatiguing. The Fiio X5 crushes the AK100 IMO and for less money. I owned the RWA AK100 and was very disappointed in that purchase. The AK120 on the other hand really impressed me and I kept that unit. I modded it to the S-mod which is much better than even the AK120.
4/19/14 at 5:41pm