Home theater

A home theater or home theatre is a theater built in a home. Home theaters are designed to be like watching a movie at a movie theater. 
Home cinema, commonly referred to as home theater or home theater, are home entertainment systems that try to give you the feeling that you are watching a movie at a theater
Backyard theater often uses a foldable screen, a projector and speakers. Some people build permanent screens and speakers. 
Home theater in a box, is a home theater package which includes a DVD-Video or Blu-ray Disc player, amplifier, speakers, a radio, speaker wires, connection cables, a remote control, and a subwoofer
AV receiver, often called a home entertainment system
Front video projector and projector screen
Home theater PC, using a computer and a media center software 
Media center, refers either to a computer or to computer software which can play music or movies, photos etc
a Switchable projection window turns a window into a TV screen