Front Projection Systems offer the best image quality and color accuracy, typically at the highest cost. Therefore, front projectors require almost complete darkness for the image to reach the screen. Front-projection systems are most appropriate for rooms that are dedicated theater setups and can be darkened even during the day. The sheer size of the image that a front projector can produce elevates the movie experience to a new level. This is the point where you'd rather watch a film at home than go to a theater.
Stereophonic sound uses two speakers to create a balance of sound from the left and right.
Movie theaters use surround sound to impact large audiences with the feeling of being in the middle of the action, rather than distant observers. Likewise, surround sound is an essential element in creating the home theater experience. The concept of surround sound for motion pictures was introduced by the Disney Studios in the early 1940s and first used for Fantasia . It is a three-channel process designed to create the sense of ambience experienced in a theater. The front left and right channels were fed a full stereo signal, but now there was also a center-channel signal to reproduce dialogue, music, and effects.