I find that they have great bass, but it is not the boom-boom type. I compared them to the Grado GH2's and Focal Elex's. The latter two were thumpier, but the bass was a lot more messy and unfocused. I have never heard a headphone that cuts bass this cleanly. While listening to them, the words that go through my mind are; clear, clean, precise and well-defined. They are a completely different definition of bass from the Cascades. Just doing quick A-B's they sound so much cleaner than my Grado's, Elex's and HE6se's. It will be really interesting to test these against my HD660's. I was nervous about this buy, but I have really hit some home runs lately (he says oblivously as he keeps trying to sell off other headphones ).
The bass texture is great I just like there to be a bit more thump to it and once I kick it up about 3 or 4 dB it's just about perfect. Other than that I really don't find any faults with the headphone and it's one of the best dynamic driver based headphones I've heard.