Horn Speaker Recommendations

I prefer ( and build ! ) systems using horn on the very wide 80-20Khz range, with active open baffle big diaphragm subwoofer.
This principle avoid bass issues in "small" rooms (35sqm, about 320sqft)
...and take benefit of life-like sound and efficiency of horns in almost all the range : You can use even a 2,5w triode amplifier and play Mahler 3th symphony or Amon Tobin Electronic music at very loud levels.
(raw finish + direct selling = 14K€ for our system  https://www.kornhent.bzh/. )Marc HENRY

Larryi,
I love experiences around old and new ideas. I always want to know if old solutions are very good solutions or just...old habits :-)
My own experiences about bass are here :
https://www.latelierdumicrophone.fr/bloglast articles  are in english/french, older articles in french only.i will take some time, a day, to write about the particular two 15" bass horn we used on the first model of the Grande Castine horn speaker.

Rolling pictures of KornHent.bzh are from customers, most of them are old, coming from the first period i sold horns ( in early 2000's)
I love small Onken with Altec 414. Not at all the Onken W for several reasons (it is probably not the good thread to talk about that :-D )

for Larryi again !
i use actually BMS 4596 medium (no coaxial). Very natural, No distorsion even at low frequency and high level. I prefer it over Beyma 850ND and Radian 950 i used formerly.Moreover, it is easy to make a crossover with this BMS : there is a natural rolloff at 3000Hz.
The new Celestion Axi2050 is probably another good solution.
for the treeble i love the cheap B&CDE120 and the Faital pro HF108R
for the bass it is a custom made 12", by Cyrille Pinton. i was not able to find the 12" i need in actual products !

Some ideas about hybrids and other horn system, and coherence.

Almost every horn system have dynamics, and gives more "flesh and blood" than classical "box speakers".
but...
As said @mrdecibel, coherence is essential. To my opinion, THE point to accomplish when making a speaker. Coherent speaker are not so frequent , and coherent horn systems are...very rare :-D
Even if i do not close my eyes, i want to forget how many speakers/horns are playing. I want to hear musicians between the speakers, not treble / medium / bass horn

With any hybrid horn speaker, there is ALWAYS a mismatch. Even with the best (even those i made years ago :-D ), even perfectly crossed and time aligned, the mismatch is in dynamics behavior, or "speed" feeling, or tone. 
One can be easily blown away by his first listening experience with this kind of horn system. To be still in love with it weeks, months, and years later is another story !

About La Scala and comparable speakers : Properly used they can be enjoyable...well, exhilarating speakers ! They are very compact for their efficiency too, and affordable. Many good reasons to by and keep them...But  i am not found of the horn association : For me it is a bass horn with a medium horn. Who is supposed to reproduce the low mid ? male voices ? cello ? A 15" speaker cannot do that properly, moreover in a folded horn. An heavily truncated  500 Hz acoustical cutoff horn neither.

When testing a horn system, it is unnecessary to play "boom-boom-kss-kss" music (rock&roll, many jazz trio, and of course audiophile drum records) : this will be fun and probably good. Most of the problems will occur playing voices, or string quartet. Play them to point out mismatch between the horns, crossover issues, phase shift, blur in sound stage (when it is not image overlays :-D. )...

For all those reasons, when i do not listen a perfectly voiced full horn loaded system, i play a simple full range in open baffle.
For coherence :-D

Marc HENRY
https://www.kornhent.bzh