I think Kemper is the only one who can answer, but I'm wondering how long of a response the KPA is capable of profiling. In other devices, one can figure this out by knowing how many taps are in the Impulse Response for the speaker system. For instance, a 1024 tap IR will be about 21ms at 48kHz. The KPA obviously has some time limit regardless of what method it uses.
I ask because there is clearly a time limit of what can be captured in the response of the amp to the test stimulus. I experience nasty artifacts trying to profile an amp with some ambient room mics. The KPA was basically seeing "reverb" and considering it a "time based effect".
If we knew what the time limit was, I think we could infer the maximum safe distance a mic should be placed away from the speaker?
Of course, in a really reflective room (like the one I was playing with), the whole room response needs to be taken into account for the time limit.