![]() ![]() ![]() ![]() The most common stereo and surround sound channel/speaker setups in use are 2.1, 5.1, and 7.1.Ģ.1, 5.1, and 7.1 refer to the number of amplified channels provided and, in most cases, the number of speakers needed to set up the system.Ĭhannels: How the sound is directed is designated by the encoding used by the source and decoding or processing used by an integrated home theater system, home receiver, av/preamp processor, or soundbar. With the beginnings of the home theater in the 1970s and ‘80s, surround sound was introduced which resulted in expanded speaker layouts that placed sounds all around the room. When stereo (aka two-channel stereo or 2.0) sound became available to consumers in the 1950's it added a more realistic soundstage for music listening where instruments and vocals could be separated and placed to the left and right front sides of the listening room. ![]()
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