a little bit out of topic,
I've came from ipod 5 era, then LG v20 and blown away with the sound, but one didn't quickly satisfied, i've believe there is much more to find ( in sound perfection) then I've jumped to dx120 and find my feet in the some called "audiophile ground ) and the story goes on...
yup now people can make a lot just by their smartphone, but they are not the same in quality to the stand alone products, well movie makers still use the 50 grand camera instead of their phones. well unless the eyes can't tell the difference between smartphone camera & red professional camera, same thing like portable audio, if we can't really tell the difference between mp3 320kbps and dsd why bother spend thousands?
just saying...