> Something that's not obvious from most of the published pics is that the rotary subwoofer was using an entire hotel room to serve as an enclosure. IE, you're

> Something that's not obvious from most of the published pics is that the rotary subwoofer was using an entire hotel room to serve as an enclosure. IE, you're not going to easily get loud bass at 10Hz without an enclosure, and the Thigpen sub used an entire room. This is called "infinite baffle." Basically just a wall that provides isolation from the other side of it. It is merely a type of speaker enclosure. https://en.m.wikipedia.org/wiki/Loudspeaker_enclosure https://en.m.wikipedia.org/wiki/Loudspeaker_enclosure Normal subwoofers can also be used with infinite baffle. You can use an attic, basement, or crawlspace to create it.