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.
128x128davt
This is not a living room or "normal" listening room any longer! This is more like a mastering/monitoring studio!

Chris
What do you put in the listing once you want to sell your sub-sub-woofered house?
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.