DAPpower
1000+ Head-Fier
Well, I don't have SR15 for comparison, but considering others referring to the original as having a thin and less engaging sound, I can tell you from my experience of playing with SR25 now - it's far from it. I hear a relatively balanced neutral natural fuller body tonality and good resolution, very similar to Plenue R2 and Hiby R5. But, it has a wider soundstage perception in comparison to R2 and R5, and more layered sound with better dynamics. It was just a quick comparison, but both R2 and R5 sound a little flatter in dynamics next to SR25 playing the same hi-res 24bit FLACs w/U18t. While it is positioned as A&K entry level DAP, the sound performance is more mid-fi, not entry level
So the sound is more balanced overall, this technically sounds a bit like the SP1000m I had.
How about the battery life and useage? Does it stand close to what they claim on paper?
How fast is the OS in terms of navigating the playback and settings?