So, When I'm using my headphones (M40x) from my motherboard it sounds worse than using a line-in with my phone(LG,G2)
The stereo separation/overall sound quality is much better when coming from my phone while using googleplay as my main player, I mean, I've tried it over the web and even using my 320 copys from foobar and the sound is still better from my phone as a line-in.
I have no idea how else to describe. Everything sounds richer, more bass, a wider sound stage, I don't even know how the fuck that possible.