From Veazey's article in the Clarion Ledger
Valencia said the Meyer Sound system is the same that was installed at the University of Phoenix Stadium in Glendale, Ariz., which has hosted the Super Bowl. And get this: It can only run at about 15 percent capacity before it gets so loud people in the stadium complain.
Behind the board, there are 10 different levels for workers to stand. In order to keep the board cool, a massive air conditioning system has been installed.
But there's no denying the sheer impact the giant screen will have Saturday. Busby said the new board, with its total width of 152 feet and height of 135 1/2 feet, is the second-largest such structure in college football behind the one at Texas' Darrell K. Royal-Texas Memorial Stadium.