Horn Speaker Recommendations

I attended the 2019 Munich high end show. Horn speakers were everywhere! I think all major and many minor brands were present. I auditioned many of them, and enjoyed the Avantgarde speakers most of all - I ended up going to their booth several times. They had the Duo Mezzo and Uno Fino models on demo. I later found a dealer where I could audition more comprehensively, and ended up acquiring the Duo XD model. 

OK correct me if I am wrong but going to the Avantgarde site I see this speaker has two woofers for the sub section but no horn for them. So if this is a cabinet sub and not a horn once again someone does not understand what was asked by the OP. Namely a pure horn set up.
  People it is plain and simple. Horn subs, true horn subs can't be small to produce the sound. A true full range horn system with good or better bass will not fit into these silly fru fru ultra modern cool looking designs. The very smallest commercially available worthwhile hi fidelity all horn full range speaker I know of is the Klipsch Jubilee. It is not however pretty like this Duo thing might be but it IS all horn.

As the OP, how I started on this adventure was because I heard the Avantgarde Uno Fino.  I had never heard any horn type speaker before.  That prompted my question and the wonderful learning experience from reading everyone's post.   I am embarking on building a modern house.  Consequently, a true horn will not fit our decor.  That means Klipsch, JBL and any big box vintage looking speakers are out.  

So if that means I would not be getting a true horn so be it.  At the end of the day if i buy a hybrid horn and I love the sound then I will be totally happy.   

There are two different kinds of 15" + horn hybrid speakers.

The first group - 15" drivers optimized to play from mid-bass to lower mid-range.
For example older Altec 15" driver like: 803a/b, 515, 515B, 604 Hollywood/B/C/E.
These drivers have great speed, tone and texture in a male vocals and cello range. But they don’t play a deep bass.
They good for vocals, classical and jazz music.

The second group - more modern 15" drivers built for rock and roll and electrical bass.
Like later Altec drivers: 416, 604K and most of JBL drivers used in speakers like: L300, 4430.
These drivers play deep and powerful bass but flat in a male vocals and cello range.

For example, I heard JBL L200, L300 and 4430.
The older model belongs more to the 1st goop, L300 and 4430 belong to the 2nd group.