Horns with good timbre and tonality?

Imaging with my ATC’s is positively holographic, with a strongly lifelike 3D placement of instruments. My system images as well as any I have heard in 50+ years of audio enthusiasm. I think it’s partly due to the fact that it’s easy to minimize room interactions because of the lack of a port. The ATC also has a rounded shape to minimize diffraction on the speaker front. I feed the speakers with Aurender N100H/Schiit Yggdrasil/Cary SLP05/SST Son of Ampzilla II/Audioquest Columbias+ biwired Audioquest Gibraltar’s, all with 72v DBS.

@audiokinesis --

Thanks for your elaborations - very illuminating.

In your previous post, on which horn type in particular could facilitate a proper reflection field, you wrote:

... Ime what works well is a constant-directivity horn which does not rely on diffraction. Most horns do not fit this description.

What about, and maybe when is the diffraction part most troublesome here; what’s inherent to - as a distinct sonic imprinting/coloration - the narrow slot section leading up to the horn widening at every volume level (i.e.: at lower levels as well), or more predominantly at higher, and perhaps only very high SPL’s? My understanding is it’s more the latter than the former, which urges the more pragmatic question of relevance in a given, domestic setting when, or rather if the issue seems to arise only at, say, +120dB levels.

I find horn size to be a factor as well, certainly with a lower crossover point and trying to maintain a fairly uniform dispersion pattern at the crossover with directivity control all the way down to the crossover. My finding here is that, generally, the larger the horn the less it sounds like a horn, and by that I mean a more relaxed, properly (i.e.: realistically) sized, dense and visceral sphere of sound. What are your thoughts on sheer horn size here?

Op

Did I miss what your budget is for your horn speakers?   That makes a big difference in what we may recommend.  I went through a whole year process which I chronicled on Audiogon and WBF before buying my horn speakers.  i love them.  

+1 Volti Audio. In my search for a neutral uncolored and high sensitivity for exploring tube amplification starting with flea watt 300B SET tube amps, I've purchased the Volti Rival 100db. I heard the Volti Razz sounded great at separate audio shows.  But if I had the space and funds, I'd purchase the Volti Vittora for my low watt amplification audio chain. 

I'd try a pair of Volti Razzes it the return policy wasn't so final. NO returns for any reason.