Tips for live use

If you get physically far enough away from the FOH speakers to feel latency, you will notice it more with guitar than you will if you get as far away with your vocal mic, because a voice has less attack than the immediate impact of pick to strings.

There is not latency from FOH Technically.. but there is the distance

Quote from Shadowcast

There is not latency from FOH Technically.. but there is the distance

If the FOH use a digital mixer there will always be a latency in the mixer + the distance to the Speakers and also add latency.
If FOH have Active speakeres with DSP's, or amps/system controller with DSP's there will be even more latency.
Many active speaker systems With DSP's can have up to 4-6 ms latency+ mixer maybe 1-2 ms.
On a stage you can also maybe hear echo from back wall og the venue from the FOH speakers,
if so turn up the volume in your stage monitor to hear less of the sound from the FOH.

Quote from collintowne

Sorry. Are you saying the guitar has stronger attack so latency is more noticeable?

Yes. And, the latency is caused by the distance.

Put the gain at zero on the mixer for not adding any color to your sound.

The Kemper is a preamp, then you don't need to add the gain of the mixer preamp.