Home theater component is a term used to describe the various components that make up a home theater system. These components include a STEREO, HDTV, and HIFISYSTEM. A STEREO is a device that plays audio from multiple sources such as CDs, tapes, and digital music files. An HDTV is a high-definition television that provides a clearer picture than standard televisions. A HIFISYSTEM is a high-fidelity sound system that produces a higher quality of sound than regular speakers.