Hi !
I'm thinking about swapping the speaker in my 'monitor amp' I use with my KPA. It's a solid state fender frontman 65R with a power amp IN, with a 'special design' 12 inches 8 Ohms speaker. It's sounds pretty good with the cab sims off on cleans and fender like rigs, but not that good on other amp types (drives are muffled). I use this amp in my home studio to get an amp feel, and also on stage as a monitor.
I thought about a linear FR speaker like the Beyma 12ga50, but this one also seems to excel in clean tones mostly.
I wonder if you have other speaker options, both suitable with cleans, crunches and heavy tones ( JCM800 & mark II c++ likes)
I also wonder if I can add a tweeter to the output in order to get better trebles ( with a proper filtering).