At the heart of the MINI's enclosure are 16 horizontal layers of extremely stiff, 1", laminated, 17-ply Baltic Birch plywood. The result is an enclosure that is three times stiffer than enclosures fabricated with the vertical MDF construction techniques typically found in high-end loudspeakers. To maximize driver-enclosure coupling, the faceplate and the rear panels are machined from 1.5" 6061T-6 aircraft-grade aluminum billets, a material 6 times stiffer than any wood product. The aluminum faceplate is optimally curved to follow the speaker's exterior profile and help reduce diffraction, while the curved internal walls of the enclosure allow for an even distribution of the pressure generated by the driver's back wave. In fact, the greater the pressure inside the MINIs, the stiffer their enclosures become. This results in minimal energy losses, translating to maximum bass definition and control. The drivers are completely decoupled from the wooden parts of the enclosures and no hardware is used to hold any metal parts to the enclosure, permanently ensuring a totally sealed enclosure.