DFX 9.3 Audio Enhancer for Winamp - Best sound enhancement plug-in for Winamp. DFX makes your music and videos sound better.

Recommended DFX 9.301 update for Winamp which improves user experience. DFX enhances your Winamp listening experience by improving the sound quality of MP3, AAC, Windows Media, Internet radio, and videos. Renew stereo depth, add 3D surround sound, restore sound clarity, boost your audio levels, and produce deeper, richer bass sounds. With DFX you can transform the sound of your PC into that of an expensive stereo system placed in a perfectly designed listening environment. "DFX for Winamp makes your MP3s sound much, much better. On top of that, it's free, and you can use it as long as you want." - CNET Download.com

This is an updated version of the popular DFX plug-in which (hopefully) resolves some of the compatibility issues people have had with it with recent 5.5x clients. This is a feature limited version (obvious through the install process) which allows you to sample the plug-in before deciding if you want to pay for it to enable all of it's features.