From Electron Cloud
I got a waterbed in about 1998 or so from a yard sale, but it just had a plain base without any storage. Now, it has a lot of storage, and a couple of Aura Bass Shakers in lieu of a subwoofer. :-) Not that that's a particularly good idea as it turns out... there is a lot of mass of water in the matress, and it doesn't transmit bass very well. So it's quite loud if you have your ear against the matress, and not very loud otherwise.