i think the V-Moda's have more bass than the Sennheisers, but they are in your ear and the sennheisers sit on the out side
but they have some nice bass for headphones, i listened to the v-moda's then hooked up my creative zem headphones...WOW, i dont see how i even used those creative ones
i would deff buy the bass freq's again
EDIT: just ran through the bass mekanik cd with sennheiser's, they have some nice bass now(they wernt that loud a little bit ago, maybe breaking them in a little?), they will play below 30hz //content.invisioncic.com/y282845/emoticons/up2something.gif.dd110ecf3ae4b76050d87598f2f8de7c.gif
now to try the bass freq's