Cx9 audio distortion
 

I buy a cx9 2010 with bose system when i conect my mp3 player via aux some songs have to much distortion in the sound i choose to change the head unit for another i install a pioneer with bt system and make the same distortion in some songs if somebody have the same problem and they can help me because for this problem i dont feel good in my cx9 i thinking in change all the audio system for another

thanks