The headphones received with my mpx player were OK but I have a lot better sound using the SENNHEISER MAX400 which i bought about a year ago.The sound output from all the MPX players is low, around 10mW. When buying a new pair of headphones compare the Sound Pressure levels SPL which is quoted in dB. There is a lot of difference between brands. Watch out when you do compare them that they are using the same power input to the headphones otherwise you can not directly compare them. Also look at the frequency response curves, there can be a lot of difference in these specifications too. Hope this helps someone a little
Regards
Rowland