Installing a home theater system sounds simple enough. Plug in a few speakers, add a projector and screen, choose comfortable seats and you're ready to go. But if you're looking to truly recreate the theater experience, it takes a lot of planning to fashion a home theater design that reflects your personality and offers the best audio and video possible. Without the right foundation, you could end up with an installation that misses the mark. Read on to avoid these common theater design mistakes in your San Francisco, CA home.