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Rules of thumb
These general rules will help, but every room and sound system is a unique combination of various elements. Start with the general and move carefully to more and more specific treatments of your room. If you are not comfortable making standing wave calculations or balancing acoustic elements, by all means get some help. The more you are spending on your system, the more you owe it to yourself (and the family) to make sure it is done right. Now, some tips:
• Carpeting is especially important between the front speakers and the listeners, as it catches the first reflective sounds.
• Acoustical wall paneling and/or curtains near to the front speakers also help.
• Do not paint acoustic panels, as it reduces its effectiveness by making it more reflective.
• Soft furnishings (sofas, cushions) contribute to echo absorption.
• Typically, the ceiling should be a hard surface so it can carry sound from front to back and diffuse the surround signals around the room.
• The average home theater design should have at least 35% of the total room surface area absorptive (floor, wall and ceiling area), and most absorptive surfaces should be in the front half of the theater.
• With the rear of your room having more reflective surfaces, sound diffuses better (again, the surround signals, especially) from the rear speakers.
The placement of your speakers, television and furniture all add to your home theater experience. Sure you want comfy chairs and sofas, but if they are too big to situate them properly, your media experience will suffer. You also need to take into consideration where the speakers will be placed. It is ideal to have a center speaker located in front center of where the "audience" will be sitting, a speaker on the front right and front left as well as speakers behind the seating area. As far as visuals go, you want all the seats in the house to have a great view of your TV so you should design the room with these things in mind.
Even though you do not need a professional to help you design your home theater, you may be better off getting their help; at least during the beginning stages. Many people that try to design their own home theater end up wasting a lot of money on things that they do not need, or things that they could have found somewhere else for less money. When you are working with a professional interior designer, they will supply you with a couple of different ideas, and then you can work with them in order to ensure that you get exactly what you want. The only downside to hiring a professional is that you have to pay for their services. But even though you may have to put out a bit of extra money, you will be ensured of getting a room that is professionally designed.
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