Kones are brandband speakers and CK said you can try and put them into opened-back cabinets.
There are Jensen's imprints and, IMO, it could be better to tend towards Fender's sounds with opened solutions.
On the other hand, you're right to underline sound's incidences in this configuration (there's bass boost too )
I think you mean broadband? Nevertheless, I've actually been wanting to try some of my rigs in an open back because they aren't quite as "3-d" so to speak. If the cone can survive an open-back I might be taking a saw to one of my kab backs. I'm off to the shop!!! Thanks!