Almost every household has a home entertainment system, but few households boast an energy-efficient one. The standard setup includes a big screen TV running in tandem with a massive set of speakers, a cable box, a dvd player and more – and all that gear adds up to a massive energy footprint. Fortunately, there’s a great array of handy gadgets out there that can help you dramatically reduce the energy consumption of your audio-visual rig. Hit jump for a roundup for our 5 favorite green gadgets that will help you turn your home entertainment system into a clean, mean set of energy-efficient machines!