Bose F1 Model 812 - speaker - for PA system

The Bose F1 Model 812 flexible array loudspeaker is portable loudspeaker that lets you control its vertical coverage pattern. Simply push or pull the array into position to create "Straight," "C," "J" or "Reverse J" coverage patterns. And once set, the system automatically changes the EQ to maintain optimum tonal balance for each coverage pattern. So whether you're playing at floor level, on a stage, or facing raked seats or bleachers, you can adapt your PA to match the room.