New DFX 9 Audio Enhancer. Pump up your music! Incredibly Easy To Use. Simply turn on DFX and be amazed at the added sound clarity and punch that your media player provides. A DFX enhanced version of this player transforms the sound of an average PC into that of an expensive stereo system placed in a perfectly designed listening environment. DFX audio enhancement improves the sound quality of MP3, Windows Media, Internet radio, and other music files.