Why not horns?

Mapman - at the risk of being slightly off topic, I can say from experience that Khorns can work in a smaller room. My space is 13 x 13 and while I suspect my imaging would be a little more focused with more space, I'm very happy with the sound. I have modified them a bit - Crites tweeters and crossovers and Trachorns. I'm running a primarlly analog system with low powered (but really nice )amps - and at least for me, the result is such that I'm not inclined to change anything.

Mapman: You may want to consider the LaScalas. It is my understanding that the bass is horn loaded via the cabinet construction and unlike the k-horns does not require a corner to provide the horn. It does not go very low however - I believe around 55 Hz. My reason for the suggestion is that this way you stay with a full horn loaded system. The Heresey bass, I believe, is not horn loaded. This is not to cast aspersions on the Heresey or Cornwall but just a rather purist approach, i.e., if you want to try horns try a complete horn system. Of course there is the practical side in that you have ready access to the Heresey. If you do opt for any of the Klipsch please keep us posted as to your assessment - pros and cons.

A question about Klipschorns.

How far do they extend in each direction along the walls away from the corner?

When viewed from above the K-Horn looks like home plate with the point going into the corner. The idea is for the bass to vent from the rear and use your room walls as an extension of the basshorn. While there is probably no more than 24 inches of cabinet adjoining the side and rear walls, you do want your walls to extend smoothly , without interruption well beyond the speaker cabinet if at all possible. I'm not sure that failure to do this is a game breaker, it is said to compromise bass performance. Maybe there's a K-Horn owner here who can refine my comments. I used to sell Klipsch in the late 80s and I can remember achieving pretty good results with a pair of K-Horns and a Levinson ML-9.

Try putting a wanted ad on Craigslist in your area. You never know but what somebody will give you a call.

Mapman: The bass extension of the k-horn depends on the length of the horn - which is the lenght of the corner in each direction. I believe that to get the full extension you need corners that extend 48 inches in each horizontal direction. False corners work just fine so long as there is a good connection to the speaker cabinet.