Thanks for your replies!
I wish I had a better understand of how the shape of a horn (bends, angles, etc.) affects the sound going through it. I will try to find some information about diffraction.
I don't know whether 'phase plug' is the right term, but here are some pictures of the horn I...
I'm not sure if you do measurement microphones; but I'd be interested to see how the Dayton Audio iMM-6 Calibrated Measurement Microphone compares to more expensive kit.
I was using stones for a while, but what really lifted the veil for me was supporting my speaker cables on a bed of shredded $100 bills. You have to use the old ones, though; the security features on the new ones introduce glaring digital artifacts.
This is my first post, after lurking for a while.
I'd like to bounce an idea off of your collective brains. I've been sketching an omnidirectional speaker design based on a multiple-entry horn (or coentrant horn, unity horn, synergy horn). Here is a rough drawing showing my thinking, such as it...