I have some limited experience, I think Thomas Schick has more experience
Hi
yeah, 33% more than you David,
I heard three 15a speakers so far.
A stereo pair and one mono.
But quite a few based on the so called Sato horn. This an interpretation of a snail horn opening up to 1x1m.
There is also a so called WE66 with comparable dimensions.
Actually a French 'invention' as far as I know, at least not an original WE design.
These horns are still crazy, but much easier to place in a home setup than the the really huge 15s.
I have heard the 16b intensively on the Munich Hifi show for a couple of days, since my 301 setup was used in that system and I was in that room most of the time.
The 12a and 13a in Japan in a collection with all original amps, supercool but not hifi at all. I am sure they can sing, but if it is simply old stuff, that is not what it takes to sound really good.
(a and b simply means one or two drivers per horn in the WE logic,btw.)
From what I can tell the horn systems with Satos or WE66 excelled.
Build by guys from whom I learned a lot. Dietmar and Kalle from Germany, and Karel in Belgium. Interestingly that they came up with similar solutions and settled for similar approaches, should make you raise attention.
To me these snail horns need to be run in 4 way systems. The large snail horn, can reproduce a very wide range of frequencies.
However, the drawback is that reflections in the snail will bend treble to one end of the horn. That can cause some nasty coloration, which is my guess why Jo LeBong is not over enthusiastic about them?
Notice the cloth pieces, sheep skins, carpets and whatnot inside of the 15a setups.
(Hm, sound reflected on a curved surface, that is the JBL Paragon...)
I have yet to hear a WE15 setup that does the trick with three ways.
But maybe Aldo can shed some light on that problem (and its solution)?
In terms of magical midrange the 15a does it, goose bumps guaranteed.
Yet coloration was there, even if you don't care about it.
Reminds me of what Jean Michel Le Cleac'h said when he heard my Klangfilm baffles.
"No bass, no treble, but a lot of music"
The HK 15a DIY project has some concept of its own, using uncommon crossover frequencies and drivers. However, the sound is authoritative and very well separated from the speakers, despite the fact we listened in a relative close distance. Still puzzling how he did that.
Compared to the Sato and WE66 systems in Europe, I have to say they are really well balanced. Both 15a systems I heard had their problems, but the magic happened.
I will have the opportunity to listen to another WE15a system in May, before the Lenco meet. I am looking forward to that.
Best
Thomas