“Unlike other ‘surround’ headphone offerings, the Ultrasone HFI series does not offer gimmicky hardware or software processing, does not require a SPDIF, Toslink, or multiple mini-jack connections, and does not have silly additional speakers hanging of the front or back. What the HFI’s do feature for 3-dimensional sound is a patented technology called S-Logic Natural Surround Sound.”
Sounds like good stuff. Especially since I am in the market for new headphones! Check out the full review at Hard Avenue.