[DrWho]

Not to put a kink in your designs, but I wouldn't design around room gain for providing low frequency extension. Boundary gain, yes, but not room gain. You want to be somewhere inbetween. Also keep in mind that WinISD is providing ground plane predictions...throw things in a corner and you might need to take polars into account as well. I have also found that the shape of the rolloff matters just as much as where the F3 ends up...
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