Good variable factors, @mapman ...
Enclosure design teeters on the design of a wooden maze in a small enclosure. I can see while open baffles are trendy for dipoles, an omni has it’s own weirdnesses.
I’m fooling around with acoustic suspension, a la the old AR’s.... It heats up the voice coils, but the thought is to self-spec units made to be abused....
I.e., instrument speakers, Kapton forms, venting....stuff that can handle the heat. When the ’backside’ of the magnet gets hot to the touch, the norm is about to fry.
At least I’m my own warranty dept., and I know how to fix it..... ;)
No shipping issues....time lag? 'Ehhh...' *L*