I just acquired a Peavey 118 speaker and have nothing to put it in. Unless an 18" cabinet falls from the sky and lands in my yard I am forced to make a box. I am interested in the longthrow design. I spent a few minutes searching info about them, didn't come up with too much. If you have any experience with them , know some pro's vs cons .Please clue me in. Should I use plywood or particle board? Stuff like that I need to know. Thanx , Shane.