Hi Sloped and all,
Note that the front of Axiom speakers has rounded (chamfered?) edges that run the entire length of the enclosure, to address edge-diffraction effects. It's quite important and most careful designers approach this with different techniques.
By the way, an acquaintance of mine who ran a small Canadian speaker company for a short time back in the late '70s claimed that the best-dispersed highs he ever achieved was by suspending two raw tweeters from the ceiling using nylon fishing line. The wires from the tweeters led to a module below that contained the woofer and midrange drivers.
I never heard the setup or tried it myself, but I was always intrigued by the idea. . .
Regards,
