The home theater system begins with having a large, high-quality, generally big-screen television? possibly a video projector. Also, the video equipment that people generally use in their home theater systems is often HDTV capable. The preferred movie source used in these types of systems is usually the high-quality format, such as DVD or laserdisc. The old setup of the older home theater systems typically only used stereo VHS formats, while some used hard disc-based systems. More on why buy a home theater system.