Pretty sure it refers to the audio system and enhanced picture. The audio moves side to side, front to back and up n down as if you hear it really happening in the space you're in... Dolby Atcom. It's great, but honestly after 15 mins you get absorbed in the movie, and the sound is just sound. It sort of becomes normal
D Box is a movie format that when seated in a D Box seat the seat will jump and move to certain aspects of the movie. Mostly used for Action movies. Not all movies are filmed in D Box format
It's a section of chairs that have extra effects tied into the sound, like rumbling and stuff.
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