Like any well built product the "chassis" or in the case of a speaker, the frame body must be made from a solid structure. Die-cast aluminum provides this base structure and is also tightly integrated with the acoustic design considerations. The frame is designed to be "minimalistic" to avoid rear reflections that radiate from the back of the speaker cone. There is virtually no parallel or perpendicular surface to the cone and the frame area is minimized yet solidly designed through extensive mechanical Finite Element Analysis.
Flex Fit™ represents Rockford's proprietary mounting pattern utilizing elongated slots rather that round holes. This allows the installer to more easily mount the speaker to varying hole patterns.
3-Way Connection Terminal allows for direct solder, bare wire via set screw, or a quick disconnect spade type tab on the midrange for simple reliable connection options.