Media Player – Media Player That Increases Sound Volume

I find it very hard to believe that VLC plays less formats than WMPC does... Very very hard. What kind of video's are we talking about here? Since VLC DOES allow you to exceed the 100% volume setting, this would be my recommended solution for you. When its volume bar is filled half way, it's at 100% volume, that means you can set it up to 200% volume from VLC.

UPDATE:

Besides VLC you could also check out http://www.fxsound.com/dfx/pages/overview/index.php?vendor=0&subvendor=0&plus=0&refer=0

Go to speakers configuration in Vista/7, Playback devices, Speakers -> properties, Enhancements, check 'Speaker fill'.