Despite my previous mixed feeling about musicality of ES9018 based on the experience with entry-level Audio-GD DAC+headamp (no-loopback, no-opamp, A-class output), I must confess that I have recently bought old flagship-killer: Meizu MX4 Pro phablet/smartphon with mobile version of ES9018 and this small device have surprised me a lot in a positive way. Meizu MX4 Pro sounds really natural without any observed technical sounding artifacts. The sound is sometimes a little too bright, but in acceptable way (not an irritatning-brite). Sounds much better than ES9023 based, cheap, but quite good SMSL M2 (USB DAC) on the line-out (headamp in it sounds in little technical, dirty-like way and can't be fully accepted in the long term, so it's wise to skip it). Meizu MX4 Pro can drive various of the headphone types including including even 8 Ohm DT48, 50 Ohm HE-6 to quite enough loud level, and very easily all 250 and 600 Ohms. The SQ is really good - maybe not as good and realistic as in case in old multibit DACs and no-loopback discrete approach with deep A-class output stage, but good enough, I can risk that it's event can be described as a superior SQ in a category of such a small devices.