I built these and the Polk Audio center channel for my brother. With John's help I made my enclosure ported. 30" tall and 7"x7" on width and depth. I added a reinforcement about 1/3 up from the bottom. Put some acoustic foam in the top. Made an 18" red oak front baffle stained in "Gunstock" to match the center channel. Again I recessed the drivers with a trim router. I did make some legs and put spikes in them because they seemed a bit top heavy. The port wa [...read more]