I wired a very large house years ago. It had a theater that was bigger than a lot of houses. Very large arched room. Had lift out tiles as the floor with a space underneath for the subs. When the install techs demonstrated the system they put on Jurassic Park. The glasses of water in the room shook when the dinosaurs stepped. Next they played days of Thunder. You could close your eyes and imagine the cars going around you. Definitely some high tech stuff for the Mid 90's.