It's difficult to sell six different pairs of headphones for more or less the same price without making a lot of them very similar.  Unsuprisingly, the K311s don't do much to stand out from the rest of the range.

A Transparent Success
The outside of the K311 is made from transparent plastic, and you can see the wires on the inside as well as part of the speaker.  It doesn't make them particularly reserved, especially given the silver trim on the outside.  Although it looks like AKG was trying to make a futuristic toy rather than a serious piece of audio equipment, they're not entirely repulsive.  No accessories are included.

Improved Bass Reponse?  Well, just about
The K311's packaging proudly claims that the bass has been improved, but it're still not going to blow your mind.  You definitely can hear the bass, which is something we wish we could say about a lot more headphones.  That said, it does tend to drown out a lot of the mid-range, which could do with being beefed-up.  The treble is clear and lively--so much so that it's sometimes a little too agressive.

The sound that comes out of the K311s is very powerful, but also clear--not something we'd ever complain about.