hello djk,
I appreciate the information. The inside dimensions of my Heresy's are only 19.88 x 14 x 11.75 for a total volume of 1.86 cu ft less all the occuppied space within the box. So at a minimum it appears that the enclosure must be doubled in size. I'll have to see if these software packages would allow one to calculate the expected improvement.
I believe I have the original Heresy which I recall purchasing in 1978. I had read it was a -K somewhere but I stand corrected. My woofer is simply labeled K-22.
Cheers,
Brian