Around two decades ago, I bought my first Dolby Digital 5.1 channel surround sound home theater sound system. The 5.1 number includes both left and right front speakers, a center channel, two rear surround speakers, and a subwoofer. Nowadays there is an option for 7.1 surround that adds two more side speakers, and options exist beyond 7.1, so be sure to research it.
With the 5.1 system, I loved demonstrating to my friends how sound could travel around you in a circle like the sound of a helicopter. Especially for movies, the sound can immerse you within the setting and truly make you feel like you are part of the action.
Read more: http://www.southwestjournal.com/voices/news/the-benefits-of-soundbars-for-home-sound-systems