My DS installed a surround sound system on our LR television. I have no idea how it works....but it only amplifies the volume on movies - not regular television. When he puts a movie in to watch you can hear it in the next county......no lie. It's just like being in a movie theater. I can't take it. I have to go watch in my bedroom with the door closed. Just last week he watched some cops and robbers movie and the pictures on my wall literally shook.