Once you really learned to "read" the KPA everything is easy.Over the past 3 and a half years I have choosen some 20 profiles which just work.I mean no matter if live,recording,jams or whatever.They just work.Like with a good tube amp I can "tweak" while playing them with my fingers to get the sound I need.I "found" them with my studio monitors (Tannoy sys800) which I really know well know for some 20 years.Funny thing is where ever I go with these few profiles they never let me down.
In the end the whole secret sauce about the KPA imo is to use it exactly like an amp.Dont tweak to much.To much EQ will be deadly.Maybe you will think "you got it" for some time but in the end you will not be to glad with the thing.It is the same thing like using a outboard EQ with an old tube amp.In the end it does not work no matter how awesome it sounds just at the moment you made the "tweak".
Oh..and one very important thing..maybe the most important for the whole Kemper profiler story..it is all about the definition parameter!Think of it like the "voicing" functions of the boutique tube amps.Or the "fat"/"modern" switch on a boutique ldc microphone.
So..dont think to much.If you have to think a lot about a profile and how to tweak it to "get perfect"..let it go.Dont look back.Same as you would do with a tube amp you dont like.Saying all that I have to notify that I dont play in a heavy modern rmetal band and the chugging/omph kind of things are something I really dislike.If you have to take care not to interfere into the bass/kick hz something is wrong from the start.And please dont shoot an old school guy..