Home cinema designs and layouts are a personal choice and the type of home cinema a user can set up depends on her/his budget and the space which is available within the home. The minimum set of requirements for a home theater are: a large television set or good quality video projector CRT (no new models sold in U.S.), LCD, Digital Light Processing (DLP), plasma display, organic light-emitting diode (OLED), Silicon X-tal Reflective Display (SXRD), Laser TV, rear-projection TV, video projector, Standard-definition television (SDTV), HDTV, or 3D-TV at least 27 inches (69 cm) measured diagonally, an AV receiver or pre-amplifier (surround processor) and amplifier combination capable of at least stereo sound but preferably 5.1 Channel Dolby Digital and DTS audio, and something that plays or broadcasts movies in at least stereo sound such as a VHS HI-FI VCR, LaserDisc player (no new stand-alone models of either are available; VHS VCRs are usually bundled in combo decks with DVD players), a DVD player, a Blu-ray disc player, cable or satellite receiver, video game console, etc. Finally a set of speakers, at least two, are needed but more common are anywhere from six to eight with a subwoofer for bass or low-frequency effects.