Many do not consider a Home Theater could be anything green. With pounding speakers and projection systems how could they?
Well first off, buy local. You don’t have to import the speakers to get the best sound. One of my favorite speakers are manufactured an hour north on I-5 in Mount Vernon. This reduces the overall pollution produced in delivering the speakers to your home.
You can use better building materials; Healthy and resource efficient materials: non-toxic paint, flooring such as cork, sustainable wood products, energy-efficient insulation.
Lastly in the realm of electronics there is a way to determine how much electricity a product uses. Every product has a label the displays there peak amperage usage. Compare them when shopping much like you would calories on food. Look how much they consume just in standby. Consider every watt in difference roughly translates into a $1 savings over the year.