Wayne Parham Messages: 18748 Registered: January 2001
Illuminati (33rd Degree)
The H290C horn I use has an oblate spheroidal flare profile, something often called a waveguide these days. It provides constant beamwidth, smooth response and minimum wavefront distortion.
The R1/R2/C1 network is used to tailor response for compression drivers on constant directivity horns. See the following links for more information: