The details are lost in translation so I'm not entirely sure what has been done, but it is clear that someone with the handle Giahy on the VNAV.vn forum has built one crazy speaker system.
For serious audiophiles out there, the details can be gleaned from the extensive photographic record Giahy compiled during the build process. The rest of us can stare at this crazy horn, wall speaker setup and only imagine what the sound and the experience of being in the room must be like. [Giahy]