Buttkicker and Odyssee
Here is a link for you to the
Buttkicker. I use two of these in my HT. One is mounted under my listening chair and the other is under my couch - which scares the piss out of guests who are not informed ahead of time that thier butt is about to be kicked! My favorite sceen is the train wreck at the beginning of "Unbreakable" - with the right amp setting it feels very real. I've found, however, that these tactile shakers are not for everyday use, and certainly not for dedicated 2-channel audio listening.
They've come down in price - now $399 each, but you need to get a seperate amp. The one I use is a Carvin DCM2000 which pumps out 2000 watts of raw power and can handle both shakers with ease.
There was a thread on this topic on Audiogon not too long ago, and one of the members pointed me to the
D-Box Odyssee which will set you back about $20k (or is its $25k) now!!! This is worth checking out if you want drool about the future of HT. These guys don't just shake the couch with a little buzz, they actually lift it up, down, shift it left, right, back and forth and take you on a joy ride. The Odyssee is a hydrolic platform of about 4' by 8' capable of moving a lot of weight around. Plus they encode all sorts of popular movies with their software to showcase the Odyssee's talents, etc. The place to look on the website is at the "White Paper" for the Odyssee.