映画館はこうだよ、真ん中の3本がセンター
http://drhart.ucoz.com/Cinema/THX_Wall.jpg
https://s3-media2.fl.yelpcdn.com/bphoto/9MlCu_w9xNlSlTaUwP36qQ/o.jpg
https://community.klipsch.com/uploads/monthly_05_2016/post-13028-0-85400000-1462854487.jpg
https://www.extremetech.com/wp-content/uploads/2014/03/dolby-atmos-speaker-placement-diagram.jpg