The Mainstage Theater is the largest venue in the PAC, and can seat up to 849 patrons. The proscenium is 58 feet wide by 38 feet high. Equipped with an orchestra pit, orchestra shell, 45 line sets, and 73 feet of clearance height, this theater can accommodate a variety of professional productions, from solo performances to 80-person orchestra ensembles. The stage has a sprung floor and features a unique single-piece, automated orchestra shell enclosure.