Wayne Parham Messages: 18787 Registered: January 2001
Illuminati (33rd Degree)
Midhorn plans are shown in the links below. They're conical horns, meaning they use straight-sided walls in the horn flare. That makes them relatively easy to build. I'd suggest making a mock-up with cardboard, and then use your cardboard pieces as a template to cut your wood.
Information about the midrange horn used in our constant-directivity cornerhorns can be found in the following threads: