www.bcspeakers.com
Find the speaker that suits better with your needs in an easy way, thanks to our powerful filters and the product comparator.
www.beyma.com
OBERTON Professional Loudspeakers - high quality European professional loudspeakers, coaxial loudspeakers, HF drivers and horns.
www.oberton.com
OBERTON Professional Loudspeakers - high quality European professional loudspeakers, coaxial loudspeakers, HF drivers and horns.
www.oberton.com
www.eighteensound.it
Or simply do a deep dive
https://loudspeakerdatabase.com/search/type=Coaxial
My tiny coaxial is this one:
https://www.thomann.de/se/the_box_pro_4_coax_speaker_mcx4.htm
Eighteen Sound is a leading designer and manufacturer of high quality professional audio loudspeakers
Beyma - also only pro audio
18 sound - also only pro pro audio
LaVoce - also only pro pro audio
Oberton - also...
Faital - also...
and others from the database are either pro, car or guitar
In my humble loudspeaker building experience, there are too many differences between pro audio and home/hi-fi speaker drivers. If some pro audio drivers sound ok-ish, ok or good - it is more of an exception or pure overengineering, as the main purpose of pro audio drivers is very different to home use hi-fi drivers. There are some situations where this is acceptable or the only reasonable/affordable option: like huge driver dimensions and huge SPL needed on a limited budget.
The assortment is very limited in hi-fi coax:
Dayton and SB - 2 drivers total in 30-60EUR range, both with flaws
SEAS, Kartesian and Sica - 5 drivers total, all in 100-220EUR range. There are more by SEAS, but they are very expensive
Satori - 1 driver ~300EUR
That is all. Maybe there are some cheaper Morel and some lesser known and tested TB and Peerless.