I've been enamoured by the lovely AH300 conical horn for some time...plus various others, including the very expensive system ($280,000) produced by OMA....Cogent is another one.
So, having access to quality Euro Birch ply...I had my CAD guy start up a drawing for me to build a 350Hz horn with 2 inch throat, which I'll test with my large Altec bass cabs.
See drawing of green horn.
See other pics of tasty projects from around the world.
Anyone want a set of custom horns...!