Hello again!!!!
Nope sorry not the local meca judge down here.That's Arian. Here's where I started, it won't be fun unless you get it easy, would it?
http://www.quarter-wave.com/Horns/Back_Horn.pdf
good luck reading guys!!!, that's basic theory , then there's advanced lol
@airbone
I have somthing of that sort for you.It's called an Aperiodic Bi Chamber enclosure.It uses three ports and two chambers , which adds a second resonance in the enclosure's pass band.