A digital home theater receiver is also known as an AV receiver and is used to provide power to your speakers. Additionally, it acts as a control center for the other components that may be attached to your video and audio system and allows them to switch back and forth. You can buy digital home theater receivers that are low, mid and high range depending on how much money you are willing to spend. Previously, the prices for these were very high but with the great advances made in technology today, the price of most digital home theater receivers is now considered reasonable.