@larryi Very cool. Are you in a position to share more?
Today, I heard an exceptionally good midrange horn. For comparison purposes, one channel of a stereo pair was equipped with a wooden horn with a mouth opening around 16” wide and around 13” tall. The other channel had a wooden replica of a Western Electric 22A horn (around 28” wide by 28” high). The bigger horn was astonishingly more lively and clear sounding. This horn was better than the 22A horns I’ve heard before.