create speaker tunings

in dbx Software
What is the best or easiest method for creating tunings for cabinets that are not listed. In my case I sometimes use cabinets that I built that are like the old horn loaded designs.
0
Comments
Refer to this thread
https://proforums.harman.com/dbx/discussion/138707/faq-speaker-tunings-driverack-pa2-venu360-why-arent-mine-listed