The Kone is a modified/tailored speaker that is "FRFR" (don't say that in front of CK) but modified in such a way as to take advantage of the "Speaker Imprints" that only a Kemper can feed it.
It can be used in FRFR mode without the Imprints, but is not optimal without them.
Why is it not optimal without them? I'm using mine mostly as an FFR depending on if I like how the cab was profiled and either way they sound great.