I use a DEQX DSP with my fully horn loaded DIY speakers; Bill Fitzmaurice HT Tuba folded corner horns, Oris 150 horns driven by AER BD3 drivers and Fostex t900a super tweeters. I feel that the results are excellent. The folded bass horns are back in the corners where they need to be and the mid and tweeter horns are well out in the room where they can image better. Counting the horn path inside the bass bins plus the physical separation between the horns the acoustic centers of the woofer and midrange drivers are over sixteen feet apart. With the DEQX the timing is corrected so that the acoustic centers of those drivers sound as though they are within less than 1/8" of each other. With your Khorns I also feel you would get great benefit from speaker correction, room correction, etc.
Fully active Klipschorns?
I'm not looking to buy, but often when I look at the physical design of these corner horns with the folded bass section I think to myself "Wow, these would be great candidates for a fully active, DSP crossover!"
The tweeter, mid and woofer are so far away from each other acoustically I often wonder what they would sound like properly time aligned. I can't be the only one who has thought about this, can I?