There is an equalizer in xmms:
http://www.internettablettalk.com/fo...ad.php?t=11892

Click Eq and then switch it on.
It's 10 bands! And there is a preamp.

I have no clue if it really works but it should as it's software based..
If you get problems installing/using, report in xmms thread please.
There is a launcher that puts itself in the menus but when you minimize, you loose the app. This is only a first realease, others will follow.