Maybe more important would be to define 'overall' ? And hence the reverse must be true...Driver for driver you can't submit a ported design that outperforms sealed.......overall of course!This is debateable, but mostly true and I would agree. However if the first three words of your sentence are removed it becomes un-true.
Sonny...you already know my opinion...seal em up!!!!! Four individual boxes properly placed around the space for a smoother in room response. Have you gotten a chance to read any of Earl Geddes recent papers on the subject? Really interesting observations and results.