Phil Wilson in Tulsa has a 1.3 box with a fostex 206 driver in it. It sounds quite good, though i heard it a WHILE back. It so happens, that around 1 cubic foot is the best size for the particular driver. I do not know how the port is configured in this box that is sold by classic audio. I would be careful about other drivers (like the lowther) in this box. My guess is the bass will go WAYY down. -akhilesh