My Xmms2 Client Equalizer
The equalizer tab gives you access to a finer level of control over the sound levels during playback which can make a considerable difference especially if you are lucky enough to be using high quality speakers, and can improve the sound you get even with laptop speakers. Just move the sliders with the mouse and adjust it to sound the best for your system. Don't forget to enable the equalizer settings to be able to hear the difference it can make. I think the settings are quite obvious so I wont go into great detail here, and I hope to be adding the ability to save configurations to file and reload them as required some time soon.