I don't know how to use Hornresp or Akabak well enough to achieve this, so I have taken to just using WinISD to design a ported enclosure, then playing with the dimensions a little bit as instructed by Xrk971 in his Accidental MLTL thread.

My size constraints are that I want an enclosure no more than 30 inches tall, and 5 or 5.5 inches wide (external). What I arrived at is a 29 inch tall cabinet with 4" width and 4.125" depth (internal) with a 1.5" diameter port that is 4 inches in length.

Now, I am getting closer to the cabinet construction phase, and I am starting to wonder how much I am leaving on the table by omitting the use of this more involved simulation software.

I want my enclosure to be no more than 30 inches tall, which if I'm not mistaken means even with advanced simulation, I am starting to blur the line between MLTL and regular Helmholtz due to the limited quarter wave resonance accentuation at lower frequencies. So, given this, is it okay to take my more rudimentary approach towards cabinet design? Thank you!