The bass reflex box is usually bigger, so you may experience a peak in current sealed box tunning frequency.
You might loose your box, but if that's not a problem, use any TS parameters of similar speaker and simulate in WinISD. The port tuning freq only depends on loudspeaker size, box size and tube area/length relation. Tube area can be small if those have small xmax. If they have big xmax, they you migh have a problem because tube will have to be much bigger.Moderated By: brian@diysubwoofers.org