[Sonnie]

Hey Bob and welcome to the Shack!

The BFD will easily accomodate two subs in a variety of ways.

Is the bass trapping something you will have to build when you install the subs or is there someway to come back and add it later?

I ask this because I wonder if you really need the traps and have some way of testing them to determine if they will even be effective in the LFE region... particularly below 100hz. I would probably try the subs free standing before I even built the walls and take some measurements to determine what's going on with interactions in the room first.