1.4" or 2" throat large constant directivity horns you can actually buy!

"There are these 2" horns I found on ZXPC's website -"

These are very good value. Overall decently solid and well made.

The throats may need a bit of work if you are a perfectionist.
The throat area may need a brace if you plan to mount a very heavy driver and/or will subject them to rough handling.

...but that's quite OK, considering the price. They are also pretty easy to drill / grind, so are a good test rig (e.g. to try a DIY Synergy, without too much work / without buying a lot of tools).

I extended my ZXPC horns & built them into a fairly solid enclosure (see post 20).

https://www.diyaudio.com/community/threads/paper-cone-open-frame-driver-for-front-horn.275899/

One day soon, I hope to get these horns (or something similar), soffit mounted in a dedicated room.
 
Have anyone tried Joseph Crowe horn design? how is it compare to other popular one?
I have got ES-600 and I can compare it HF950. The ES-600 has much narrower beam, but they seem to produce more stable imaging when being placed close to the front wall. ES-600 are 2x more expensive if being printed, or 10x more expensive if being made from wood.
 

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Hello there!
May be my contribution to this thread is obsolete, i have a stereo setup with quite large horns in my home office, here the thread link:
https://www.diyaudio.com/community/threads/ultimate-open-baffle-gallery.123512/post-7393996
The waveguide for the 8 inch driver is too small for the kick bass extension of the midrange wood horn, i know that, it is intended for another project and only for testing in this construction. The wood horns comes from here: https://www.lautsprechermanufaktur-heyder.de/en-us/lmh-horns/strak-horns - they aren't really cheap but if you look at the cost of the wood itself it is OK for me. I have purchased a pair of of these drivers here: https://www.bcspeakers.com/en/products/hf-driver/1-4/16/dcm414-16 and in combination with the 16 inch wood horn with tractrix shape and a small amount of PEQ in Hypex fusion plate amps they sound really good for me. I have a CLIO pocket measurement system, i need some help for carrying out the big construction and make some decent measurement outside in the garden