Wine cellar included. I would imagine that the Thigpen rotary woofer would equal it up to at least 20 Hz. It too might be difficult to disengage from ones house.
Giant subwoofer
I remember seeing a few years ago on the internet someone who designed their house foundation to be a giant subwoofer. I am trying to find this site again to show some friends the options of taking audio to extremes, (yes, happy extremes). Any other ideas would also be appreciated. Thanks, David.