Why not more popular?

I have owned spatial audio before and may buy their new X 3,x5 series  the only unknown is who makes the Tweeter- mid AMT unit 
once that ? Is known then I will consider on buying them .
hopefully not made  in China !!

What I don’t understand is why there are so few speaker companies making open baffle speakers, and why are they not more popular among audiophiles?

Because we all hear differently, have different tastes, different rooms and different systems. Different companies have different technologies or design philosophies they want to feature.

If I could listen to every speaker out there in my room, with my electronics I would probably end up with a different pair of speakers than what I have. Different electronics too. Since I have to buy something in order to listen to it, and I buy used for that reason, my selection is pretty dramatically restricted. Most of us here are probably in the same situation. So we end up with the best that we can do, not necessarily the best possible.

Open baffle remind me of fat gym teacher. Something just not right.

@audioman58, The AMT horn-loaded tweeter in the X series is a Beyma, made in Spain, great driver.

I listen to a pair of Tekton open baffles (Their sigma model) daily in the home theater & really enjoy them. I do not like them as well in the stereo system as my current box speakers (Wilson cubs) however.