Bose F1 Model 812 | Flexible Array System Loudspeaker and Subwoofer FLEX array technology: Flexible baffle design that can be configured into four unique shapes (Straight, C, J or Reverse-J), allowing the customer to choose the best possible coverage pattern for the application Vertically oriented 8-driver mid/high line array, with each driver mounted on a custom 100 waveguide, helps deliver wide, consistent coverage 12-inch high-performance LF driver provides strong low-frequency output Bi-amplified design with 2 high-output, Class-D amplifiers to separately power the FLEX array 12-inch LF driver