I bought these a few days before 2012 christmas and damn i am still shocked at the amount of bass they have. These are very clear too in the vocals and i really loved hearing guitars in these headphones. The bass doesn't leak into the mids. The only thing i dislike is the comfort but i got used to it..

The Xb800 is a very punchy bass headphone. Compared to the previews XB line up i think that the 800s are between the xb500s and the xb700s since it's bass is punchy like the 500s but the 500s do have a lil bit more punchier bass, not too noticable but like the 700s the 800s goes lower than the 500s but not as low as the 700s. I found that the mids and the highs were much more clearer than the 500s. One thing that disappointed me was that the padding where the headphones rest on your ears seem to be not enough. I felt a bit of discomfort after 30...