OK, save you the trouble (I'm on my lunch hour at work), the 13W6v2 for aported enclosure requires only 1.875 cubic feet, the 13W7 requires 2.375 cubic feet. The box deimensions for the W6 is 18.875 x 16.5 x 18.625. The 13W7 is much larger at 25.25 x 16.5 x 17.25