I'm thinking about a really small dipole enclosure for my 15" Selenium coaxials. A triangular front, a bottom, and the 2 sides meet at the top to form a triangle, but make a rounded cut on the 2 sides to form a Karlson slot at the top. The triangle shape so I don't need to damp the sides (no parallel surface) and the Karlson slot mainly to have different D's to smooth the upper frequencies and if I'm lucky pick up some extra bass.