I wonder if this is already being considered by kemper...
I guess it would just be the back board with the relevant back plates etc and the power amp attached to it.
Unscrew old rear board. Disconnect speaker from old back plate. Attach new connections to speaker. Screw on new board.
Should be very simple, yes?
We have the Kabinet. We have the Kone. We don't have the money for a new powered one.