Very interesting look to those speakers. I like it.Would love to hear them

I got the idea from Joseph Crowe's website and YouTube. His videos explain the concept better than I could ever do.  While my version does not include all the nuances of his baffles, it generally conforms to his profile.  Again YouTube has some videos of a router jig that follows a profile.  I glued up MDF and routed the profile.  The sequence is important, and I suggest the speaker rabbit be routed deeper than needed and then shimmed to be flush with the baffle.  I had to chisel the relief because mine was too shallow.