I don't think the problem is clipping. I lower the volume to have enough headroom. I was just wondering why I had to lower the volume for every single profile when hooked to Cubase and playing through Cubase. I guess it is Cubase that's sensitive? But as I said, I lower enough to not have any clipping and still have the same problem. I know what clipping is and how it works and it has nothing to do with the problem of the profiles sounding harsh.
I will look into the "clean sense" setting. I guess I expected the Kemper to work as it should right out of the box. I never touched any clean sense setting that I know if. But you're telling me I need to tweak the Kemper before it will work optimal and that this could be the problem to why the profiles sound harsh?
It would be interesting to compare a recording of my own amp just to see if it sounds harsh too. I think I will try that. Then I will have more experience on what a real recorded amp sounds like as compared to just jamming live.
There's no reason for Cubase to be more sensitive and clip if the Kemper is not clipping. Unless you are gain-staging it, running it into another preamp so that the signal clips. Does that make sense to you?
Clipping will definitely make your sounds harsh and brittle. There's also no reason to lower volume on every profile if they're too loud. Just turn down the master volume, or alternatively, lower the output from the output section.
I strongly suggest you read the manual. If you've been using the Profiler since November 2013 without knowing what Clean Sense is, I don't think there's any point having further discussion about why things sound the way they do. Then maybe post in the private section for troubleshooting where there will be more users to help you figure out where you're going wrong.