[Bikey]

How close are you planning to crossover vs Fs and how well sealed is the baffle/area behind the baffle?

 

[Bikey]

You can model a .707 enclosure vs IB, will most likely show zero difference from ~250hz on up especially bc signal will be 3db down @ crossover freq (if LR xo, so you shouldn't be remotely close to excursion limit etc.).