K-horn won't fit, any other corner speakers recommended for a big room?

WAF is overrated. 

Viking Acoustic Project X or Fantom.  I have the Grande Voix and both are in corners in a room larger than yours.  Big Soundstage!

I remember the K-horn from back in the day- late ’70s. A friend had them set up with vintage Marantz tube gear- 7 preamp, 8b amp and they sounded good. I never lived with them long term, though I heard that system plenty of times over the course of several years.

In researching vintage and early speakers that derived first from the sound for film business, I was led to understand that the K-horn was done as a "cost effective" product first marketed shortly after WWII, without taking away from Paul K’s innovations. Later efforts to improve on a corner horn include the JBL Hartsfield and modern interpretations of that. I don’t really have the front room corners for such a speaker (or for a JBL Paragon which I’d like to hear, along with the Hartsfield and the Classic reproduction of same).

I switched from stats to horns circa 2006-7. I like both types largely because of the transparency of the midrange, but the horns give me more dynamics, the ability to use SET amps (glorious, I use old Lamm ML2 amps). The system uses a modern bass subsystem, described below.

But, I’m in stasis right now, until I can travel, and hear some big Franken-horn systems using vintage elements or designs drawn from some of the earlier efforts. Why?

One of the issues is the nature of the bass (which does not appear to be your primary concern). When I ran Quads back in the day, I supplemented with Decca and later Sequerra ribbons, but adding subs (not as much selection then, pre-home theatre market), it could sound like three different speakers playing at you (I was using ARC tube electronics back in the ’70s and for a while).

I don’t know what your budget is. Some of these speakers, particularly some of the more rarified ones, are not sold in typical retail establishments, but if you avoid things like true, unmolested specimens of WE from the period, you won’t necessarily be paying the tariff for something that is highly collectible (and maybe you will- some of the vintage stuff is highly sought after).

You could do a big speaker system that isn’t a commercial product (or a current one) that delivers something a little different than a modern speaker. This is all in the nature of personal preference plus room acoustics and set up as well as your objectives. I guess at this point, my only suggestion is to not rule out the possibility of something that is quasi-vintage (since you like corner horns) but may able to utilize a better cross-over, and address any consistency issues across the spectrum (coherence is what I’d call it- a seamless presentation).I have exceptional immediacy with a horn type midrange driver (Avantgarde Duo), no crossover, hooked up directly to the Lamm ML2.

Bass- Horns

I have more modern bass, though- for horn loaded woofers and upper bass take space. I use something modern (15" subs, servo controlled,with DSP) to deliver below 55hz. I get very convincing bass that has shape, texture and body-- a very filled in, dimensional delivery of bass that I would judge as "good" if the program material contains it. Yet to my ears, modern bass sounds different than horn loaded bass, which is taut, maybe not so deep in earth moving ability, but has a quality that is very "fast", may not sound anything like a horn, but has a quality all its own. What I’ve done for now is a compromise.

Windows

You can treat these and still have use of the windows when not listening seriously. I don’t have a major problem with glass, but have treated the glass in my room as necessarily to eliminate it as a factor. Room acoustic treatments can get you out of the "audiophile approved" at a price products and into "pro" solutions- there’s a lot more knowledge in that area beyond just home hi-fi. That is readily addressable, though whether you want to use a treated piece of glass as a horn wall would remain a question, perhaps drawing you away from a corner horn as such. You can also baffle these with free standing products that essentially take the place of the "corner’" for the purpose of acoustics.

Where, generally, are you located? This, just because access to some of this stuff may require travel. That’s why I’m in stasis.

Check out a used pair of KEF reference 203/2 or 205/2 if you can find one, they featured corner placement adjustments.

For what it's worth, I listened to K-Horns, La Scala, and Cornwall speakers when I upgraded my system last year. I like how horn speakers reproduce music and I wanted to match them with tube amps. Out of the three, I preferred the La Scala speakers because the music was effortless. The Cornwall speakers do produce the "in your face" type of bass that is expected now. The La Scala bass is present, but it is more relaxed and not so energetic. I supplement my La Scala speakers with a Rythmik servo sub to provide more energy below 60hz. The servo provides nice distortion-less bass that matches the La Scala and tube combination wonderfully. As for the WAF, the La Scala has that mid-century design aesthetic that seems to be popular in home interiors. 

@whart I am completely jealous of those beautiful Avant Garde horn speakers.