After several test trail with different gears, PA Loudspeaker FRFR and guitar cab 2x12 with Tube amp with FX return for my toaster unpowered.
I was not happy with both setup to get the real guitar tube amp cab tone and also keep the FRFR super crystal clean all subtile effect that Kemper give you.
I play mainly live condition, no FOH, and i play loud with an rock to heavy rock band.
I discussed with guys from Blueamp (nice product, but far from Canada, tax, duty, transport, time and $$$ to get a stereo set-up) and i can't test there products.
issue is that the offer a FRFR / GFR switch (on-off)
I discussed with guys from Redzone too, look interesting, about same comments as Blueamp
I discussed with guys from Friedmann, ASC12, need too, not really an FRFR at the end, guys from Sweatwater do not recommanded fro my need, some customer complain too.
Finally with all consideration i decide to buy:
Mission Eng. Gemini 2 Live.
Guys, i am extremely happy with this stereo powered amp with his Coaxial speakers hooked to Class D amp and especially the EmPower adjustable pot.
The secret of the perfect match to get best of both worlds (FRFR and GFR) is the EmPower adjustment, mind is adjusted at 70% Flat.
It is amazing
it disperse sound extremely well, it is very loud, it is feel like a real tube amp, superb feedback control, keep benefit of FRFR like PA Loudspeakers, Stereo, 2x12 closed cab.
I am use to play with Mesa boogie Dual recto with closed 2x12 cab and many other amps before,
For me my several months of tests and search for the holy Grail is completed now.
Buy the way, this amp is not cheap, but less expensif than Blueamp at the end.
I also telling you a little secret of what i did on that amp.
I turned my Gemini 2 Live model (air fan that is noisy) to a Gemini studio model (silence powered supply) and i save 550$ canadian.
It took me 2 hours to do so, it is easy, safe, and it work
I put a high quality power supply (no fan), 10A output, adjusted voltage to 24.0v, and i disconnected the supplied power supply that have an air fan (little noise when not playing).
it cost me nothing since you can find this easily.
Mind is an Omron power supply for PLC electric cabinet.
No heat, no noise, filtered, 10A output, simple to connect on currents amp cables.
if you cant do it yourself, just buy the Studio model and pay extra $$