I thought it was a PC when I first saw the picture, but then realized it was a sub. Its an interesting design that allows you to place the sub in a lot of different ways. Its part of their new sub-sat system called the Millenia. I'm still looking for a sub-sat system that has sats that play down to atleast 80hz -3db.
Source: www.paradign.com
http://www.paradigm.com/products/paradigm-reference/subwoofer/milleniasub/milleniasub