I just ordered a set of RC60i speakers and am planning to install them in a kitchen wall. Our kichen remodel involved knocking out most of the wall that divided the kitchen from the foyer. The remaining ends of the wall will have a 45 degree angle at the top, coming down from a beam that separates the two areas. I haven't finished framing this angled arch, and was wanting some input. How large should the enclosure be for these speakers? The wall is 2 X 4, and the speakers will be effectively encased in this isosceles right triangle.