Need a big box all right.
Jammed alignments per Keele:
Butterworth B4 207l fb 27 f3 27
Bessel BE4 172l fb 21 f3 33
BW Inter Order IB3 168l fb 27 f3 29If I were determined to use the driver I would go with the BE4. Biggest problem is going to be the plus 3db peak around 100 hz. But, if you like your sound a little fat, this would work.
Dan