I just brought that Hydrosonic subwoofer that they were talking about a few days ago. I did some checking on the Internet and these guys are for real. They are really big in Movie theaters and are just getting into the HT area. I will write a review once I get it, they said in about 3-4 weeks. They are Sound related technologies and I got the IBS-10. They say you can see your clothes vibrating with this and you feel the vibration thru-out your body not just on the floor.