This is a very interesting subject (quality of the dac and amp part in a dap) imo.
I still have a (1st gen) X5 over here, which I mainly use with a Headstage Arrow 5P amp. The X5 stand alone doesn't come close (in sq) to my P1 or LPG, but the combination with 5P does (at least to my ears). So I guess this means that the X5 classic also has a pretty good dac inside. Would be interesting to know how much the dac of the X5 iii can improve on that :rolleyes:
Another thing is that X5 stand alone hisses pretty badly with my Zeus, adding the 5P amp gives it an almost black background as well. So, the X5 hiss must be due to the amp part? :blink:
Btw,
@jmills8
I know you have the Arrow amp as well. Have you tested it with your X5 iii from line out? Did sq improve in your opinion with that amp?