My guess is that most unhappy customers in fact do not complain but they might tell their friends. If FIIO believes as you do they are making a huge mistake. Let me connect the dots as I have experienced them….
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After all these months, pulled out and dusted off my Fiio X3II tethered to the Fiio E12 amp.
I found that the sound is “fuller”, warmer and more robust than that produced by the X5III.
So the X3II is now my go-to DAP. The hardware and software Interface is so much more intuitive.
Of course it’s harder to read the smaller screen, but the X3II has replay gain and I can sort of get
what I have been begging Fiio X5III for, “Add to now Playing” functionality – I mostly use playlists and with the X3II I can scroll to a wanted song in the playlist, play it, and the player will still continue with the list without any more user intervention.
The X5III does not have this capability.
I keep a pop-out magnifier in my pocket for when I need to get details on the small screen.
I intend to keep the X5III just for the “other” capabilities such as viewing videos with the VLC player app (I don't own a Smart Phone).
I mean the old X3II+E12amp gives me a better interface AND a better signature – it’s a no brainer.
Fool me once, shame on you….