With a real tube amp, which has consistent characteristics going out to FOH all night long, you can absolutely be sure that what you’re hearing on stage is **closer** to what the audience is hearing. Not exact of course, but reasonably close.
This is not the case if you are using a Kemper through a traditional guitar cab, but sending studio profiles of different amps, with different cab emulations, out to FOH. It will still sound good to the audience, but it will be much less consistent and you will have less of an idea of what they’re hearing.
And that’s why people use FRFR speakers, to get **closer** to what is happening out front. Unfortunately my experiments with that setup leave me wanting, and I’m unwilling at this point to keep throwing money at the problem.
sorry Cal but your logic is 180 degrees out of phase.
The Kemper approach will be closer and most importantly more consistent, not only throughout the night but also from night to night. Which is why so many major league touring acts are/have switched to digital solutions. They know that onstage sound is important up to a point but it is FOH that generates the revenue
Valve amps aren’t consistent all night long. The sound varies as the valves heat up etc. The effect may be minor in most cases but can be significant in others.
In order to have an apples to apples comparison though you would need to have the same Kemper Amp and Cab going to FOH all night long. Which many people actually do. You can’t make the comparison of a mic in front of a single cab being driven by the same valve amp all night against a Kemper setup which changes amp and cab throughout the gig. The valve amp scenario only has one core sound to send to FOH. Therefore, you can only compare it to a single Rig Kemper performance to decide which is more consistent. The answer is always going to be the Kemper.
Just because you CAN change amp and cab on the Kemper (but can’t on the traditional rig) doesn’t mean you have to. If you want the best, most consistent and closest to your onstage sound to hit the audience through FOH the Kemper wins hands down every single time because it removes one of the biggest contributors ( mic placement) from the equation.
Now, whether you think the Kemper tone and feel on stage is better/worse/same as the traditional rig is a totally different argument and is definitely a matter of personal taste. We all have different tastes and that’s good, variety is the spice of life, beauty is in the eye of the beholder, and all that.