Highly recommended cabinet design with superb SQ if followed properly.
The 2.8 (2.8 cubic feet or 80 liters) comes in two versions. The MkII has a thin front baffle, but is deeper. The "Big Port" version offers more mid bass at the expense of some low bass output. We generally recommend the "Big Port" version for most customers.
The 5.6 or 5.6 MkII (5.6 cubic feet or 160 liters) offer more bass and dynamics, in a cabinet that is not too large for most rooms. The MkII is narrower and deeper, but will not accept the 15 inch speaker.
2.8MK2
5.6 MK2