I have run the numbers for the eminence delta 15 and the program is providing very odd numbers for the enclosure ie;cabinet: motor parameters used:
encl type reflex
encl vol .2222222 lo cut 30
ideal fr 675 hi cut 1600
ideal q .5314961 eff 101
encl fr 127.9479 power 300
encl q .888889 impedence 8
encl ht 10.90272 quantity 1
encl wd 7.268482 vas 10.4
encl dp 4.845655 qd 45
frd 40