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2. 5.1 surround sound - Wikipedia

   en.wikipedia.org/wiki/5.1_surround_sound

   In addition, some DVDs have DTS tracks, with most being 5.1 channel mixes (a few releases, however, have 6.1 "matrixed" or even discrete 6.1 tracks). Blu-ray and digital cinema both have eight-channel capability which can be used to provide either 5.1 or 7.1 surround sound . 7.1 is an extension of 5.1 that uses four surround zones: two at the ...

3. Pioneer SX-1980 - Wikipedia

   en.wikipedia.org/wiki/Pioneer_SX-1980

   At an official rating of 270 watts RMS per channel into 8 ohms [1] with a measured 2.3 dB dynamic headroom, [4] this makes the SX-1980 Pioneer's most powerful receiver, as well as being one of the most powerful receivers ever manufactured in the world, to date. It was also tested in the December 1978 issue of Stereo Review. [5] Some results were:

4. 7.1 surround sound - Wikipedia

   en.wikipedia.org/wiki/7.1_surround_sound

   7.1 surround sound is the common name for an eight-channel surround audio system commonly used in home theatre configurations. It adds two additional speakers to the more conventional six-channel audio configuration. As with 5.1 surround sound, 7.1 surround sound positional audio uses the standard front left and right, center, and LFE (subwoofer

5. 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. [44]

6. AV receiver - Wikipedia

   en.wikipedia.org/wiki/AV_receiver

   An audio/video receiver (AVR) or a stereo receiver is a consumer electronics component used in a home theater or hi-fi system. Its purpose is to receive audio and video signals from a number of sources, and to process them and provide power amplifiers to drive loudspeakers , and/or route the video to displays such as a television , monitor or ...

7. Home audio - Wikipedia

   en.wikipedia.org/wiki/Home_audio

   Stereo receiver: Combines a preamplifier, amplifier, and often a tuner into one unit. Receivers often have built-in support for streaming services and multi-room audio. AV receiver: Also known as a home theater receiver, connects to a TV and decodes multiple audio channels to power a multi-speaker surround sound system.