Hi Jeff , thank you and I will follow later on your suggestion
I just try what Jeff recommendation as follow :
Source : sony WM ZX1
Dac / Amp : Centrance Hi Fi M 8
Iem : sony XBA H 3
Cable : USB to USB A wire world ultra violet to hi Fi M
USB to DAC Sony to Sony WM ZX 1
Sound quality
High : more refine and better clarity , it is not harsh at all ,
Cymbals more natural and detail
Mid : more sweet and natural
Bass : better in detail and very clean bass sq , better impact as well
Separation : wth hi Fi M8 improve
Soundstage : more 3 D like you feel in big concert hall
Conculsion : so far excellent synergy between Sony WM ZX1 and Hi Fi M 8 use USB dac function
IMO
Picture will post later