I hooked up my subwofer to the comp, and it's right next to my ear on my desk, I get all the vibrations I need hehe, those look damn wicked tho, $50 maybe a lil too much for them, you could probobly get something like that for $15-30 in your local electronics store.
I know the E-dimensional site, got a contract with them, gonna be buying their 3D glasses and maybe motion tracking for my cyber cafe. They got very nice stuff, I recommend
