@tvor-ceasar Yep, it’s hornresp, and it was a lot of trial and error to get that output down to 20hz without getting too funky of a response whilst keeping excursion and velocity below distortion points. I was just wondering about any other transmission line builds people have done.
Also, you’ll find my transmission line design isn’t very standard, hence why I had to use a program like hornresp rather than one that uses standardised geometry such as yours. I also used my own number for the damping material since I know what I’ll be using. Seems like your program is great for getting quick results though!