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2. List of CRT video projectors - Wikipedia

   en.wikipedia.org/wiki/List_of_CRT_video_projectors

   Two projectors mounted in a special pedestal allowing twice the brightness. ... 65 kHz : 1100: Digital: XS2000HT ... picture and could be ceiling mounted. Novabeam ...

3. Surround sound - Wikipedia

   en.wikipedia.org/wiki/Surround_sound

   7.1.2 and 7.1.4 immersive sound along with 5.1.2 and 5.1.4 format adds either 2 or 4 overhead speakers to enable sound objects and special effect sounds to be panned overhead for the listener. Introduced for theatrical film releases in 2012 by Dolby Laboratories under the trademark name Dolby Atmos .

4. List of film sound systems - Wikipedia

   en.wikipedia.org/wiki/List_of_film_sound_systems

   Year Name Number of films 2002: 12-Track Digital Sound: 40 2015: 2-Track Digital Sound ()586 1953: 3 Channel Stereo: 51 1953: 4-Track Stereo (CinemaScope)586 1955: 6-Track Stereo (Todd-AO and compatibles)

5. The best soundbars for your TV in 2025: No more ... - AOL

   www.aol.com/lifestyle/best-soundbars-for-tv...

   Best value soundbar Vizio V-Series V214x-K6 2.1 Home Theater Soundbar ... Samsung HW-Q990B/ZA 11.1.4-Channel Soundbar with Wireless Dolby Atmos ... the idea being to bounce audio off the ceiling ...

6. Amazon’s Portable Projector With 25,000 Reviews Is Marked ...

   www.aol.com/news/amazon-portable-projector-25...

   While some projectors can run you thousands of dollars (especially […] Amazon’s Portable Projector With 25,000 Reviews Is Marked Down to Just $65 Skip to main content

7. Quadraphonic sound - Wikipedia

   en.wikipedia.org/wiki/Quadraphonic_sound

   A four channel quadraphonic diagram showing the usual placement of speakers around the listener. Quadraphonic (or quadrophonic, also called quadrasonic or by the neologism quadio [1] [formed by analogy with "stereo"]) sound – equivalent to what is now called 4.0 surround sound – uses four audio channels in which speakers are positioned at the four corners of a listening space.