no, sorry there is not, you are stuck with the defaults that come woth the player and these players are not very advanced and use older tech, so sound quality is not that good, especially on the bass
there is nothing really you can do unless you invest in one of these mini amps from fiio on deal extreme
they boost the sound and quality a bit but it is unknown how well this will work or you, but they are cheap and worth a try
http://www.dealextreme.com/details.dx/sku.14303
they are good, i have one and they do boost quality, and volume