In the 2010s, the term "home cinema" encompasses a range of systems meant for movie playback at home. The most basic and economical system could be a DVD player, a standard definition (SD) large-screen television with at least a 27-inch (69 cm) diagonal screen size, and an inexpensive "home theater in a box" surround sound amplifier/speaker system with a subwoofer. A more expensive home cinema set-up might include a Blu-ray disc player, home theater PC (HTPC) computer or digital media receiver streaming devices with a 10-foot user interface, a high-definition video projector and projection screen with over diagonal screen size (or a large flatscreen HDTV), and a several-hundred-watt home theater receiver with five to eleven surround-sound speakers plus one or two powerful subwoofers. 3D-TV-enabled home theaters make use of 3D TV sets/projectors and Blu-ray 3D players in which the viewers wear 3D-glasses, enabling them to see 3D content.