Just curious... and I have seen the gen 2 X5 called this before. Why the "K" in your designation of X5K for the newest model. Just not getting where the "K" comes from.
Headphone Reviews and Discussion - Head-Fi.org
mandrake50
semaj8james
I honestly don't know. Originally when the Fiio X3 2nd generation, people would typically call it the X3ii or the X3K, and I guess the nomenclature has stuck!
