i take advantage of your experience: meizu pro7 uses cs43130(with internal amp i think). i don´t know this chip.it´s good?Pro 7 has max output at 1.7 Vrms
Then you enter impedance and sensitivity of your headphone and see how much it need. If it is less than 1.7 Vrms, meizu pro7 is able to drive.
my only experience with cs dac is with a wolfson dac of audio-gd dac/amp. i remeber that sound was very good