To be honest john , I can only tell you the benefits of the changes that were made. It is mostly to improve the bass response. The TS parameters of the original driver had changed over time. The box was made larger and the baffle was inverted and round port was incorporated vs a square mass loaded port. Also when Joseph designed these he was using current thinking of the time and it was later discovered that the box was too small for the drivers chosen. I really don't have any desire to learn TL
speaker design, and not nearly enough math background most likely. The drivers are 2g so I hope it sounds good. I needed a summer project and I finally got off my butt and started. I will buy the drivers once the box's are done.
Honestly at one point a (bogey) expert showed up in the thread and it got really technical and I had to skip over a few posts.
