Music from SD card in Skyfi3 sounds distorted.?

Hi I have a Skyfi3 and love it. It has the slot for the memory card and I have put many mp3s on it.
Problem is some of them sound somewhat distorted or as if they have way too much bass trying to come through. It doesnt happen to a specific song type like rap as it happens just as much on some country songs.
Other songs sound completly good as do the tunes coming directly from the XM radio. if I attempt to change the EQ on these songs they still sound this way.
Any suggestions?

Fear Allah. Allah. from the direct result of rebellion to accrue in this world, and the eventual result of weighty oppressiveness to accrue in the next world, and from the bad result of vanity, because it's the great trap of Satan and his big deceit which enters the hearts of the people like a deadly poison.

just kidding.. sorry can not assist you.

Edit: Why could anybody report Gawdzy must really love rap music

you need legitimately bought music. Music found from file sharing networks is frequently questionable as it may be re recorded or transformed and distorted. there is no telling what you are going to get when you download pirated MP3s.