I'm starting a new winter speaker project. It gets cold here in Minnesota. I am designing an 8 cu. ft. enclosure for a 2245 . I can't get any of the design programs to correlate on port size lenght etc. I need some suggestions. I plan to cross over at 300 hz to a 10in. I would like to tune the cabinet to 28hz and use (3 )., four inch I.D ports. What do your programs tell you the length of each port to be. I use this info as a starting point and use a test tone with a scope to fine tune the lenght. Any other suggestions would be great. I looked at the Solen site for help on the Ultimate experience. I have never used the 2245 before , looks like fun.