In a perfect world, with a perfect room, you'd know exactly where to put your speakers. Unfortunately, as homeowners we are often forced to compromise on things like seating arrangement and speaker placement to meet the restrictions of the space they're occupying.
You may not be able to put your sub in the 'perfect' location in the room, and you may not be able to put your center speaker exactly where you want it.
Below are some general rules to help with layout and speaker placement in your room. Whether you have a dedicated space or you're creating a multi-purpose media/rec room, these general guidelines should help you get the most from your home theater system.