Just to add....
I've been running a 1x12 FRFR cab for about 2 years now and have no problem keeping up volume wise. Having said that, as mentioned, its less about volume but about "cut" in the mix. I found that FRFR type cabs ( I say type as the Kone is a bit more than that) have more versatility as they don;t "smooth" the sound out.
Hi V8guitar, which FRFR cab are you using if I may as so bold to ask? I'm still in Kemper Kindergarten basically lol and all of this discussion is pretty new to me, so the Kemper Kone is different than what companies load into an FRFR, gotta do my research but it seems like a regular Celelstion type of speaker would be put in an FRFR?