hi! i have FIIO X1 and can get xdp-02u brand new for 215$. would that be significant upgrade? as for headphones I have RHA MA750.

How much do you think these are worth? I can get them brand new (unpacked, from 1993) for 25$? I think it is ok price?

thank you TCD1975 for the theme :) !

thanks for answering so quick :D can't wait to try it! i'll let you know my opinion about the sound improvement.

hello. i'm new here :) i've ordered fiio x1 (1st gen) and it will arrive in couple of days. i'm listening mp3s and flac files on my smartphone (xiaomi redmi 3 pro) + rha ma750. sound is ok to me but can i expect sound to be improved on x1 + rha ma750? i don't expect drastic improvement but maybe...