Don’t confuse full-range with FRFR - which is full range, flat response. They aren’t the same thing.
It looks like a regular, single cone speaker, but it isn’t.
The Kone has a regular speaker and a second, smaller speaker (called a whizzer cone), arranged concentrically.
You can’t close-mic it - per Kemper. If you do, you will have a potential imbalance between the low and high frequencies and probably some artifacts in range where the whizzer kicks in.
Frequency response is 50-10,000.