Do you any significant performance differences between the following Satori crossover/cabinet designs?
One can expect some differences due to cabinet edge diffraction.
1) Your Kairos cabinet and crossover
2) Your Adelphos crossover with a .5 or .75 cu-ft PE cabinet with or without grill
3) Joachim Gerhard's Kalasan pyramid cabinet and crossover
As metioned, the Kairos is designed to be a quasi-transient perfect design with linear phase response. It also uses fairly shallow slopes, which have a different off-axis response than higher slope designs, with the shallow slope designs being smoother off-axis.
The Adelphos use the same drivers but is designed for a more conventional flat baffle. Since it will then have a fairly typical offset between the woofer and tweeter I went with a more conventional 4th order LR acoustic crossover. This means that although I matched the on-axis response, it has steeper slopes and more phase rotation, and isn't as smooth off-axis. However, it is still a good design and comparable in a lot of ways to other conventional high-end designs that use LR4 in-phase crossovers.
Joachim's final Kalasan crossover looks pretty good and kinda falls in-between my two crossovers in terms of slope and phase response. I noticed that his does not employ as much baffle step compensation as my crossover does, so it may sound a bit thinner when placed out away from the walls, but may be more balanced when near a wall. It's just a different strokes for different folks sorta thing. Joachim is an excellent designer that I have a lot of respect for, so I would expect version to be well-designed too.