It sounds bad !!!
Ok, I've rested "Rig" (Power on+button "Rig") and it's better. For the moment I'd just test the constructor rigs and some ofthe Rig Manager.
But I really don't understand the enthusiasm of the Kemper owner's cause I found all these sounds not really fantastic (Lake of Bit [or Teeth - don't know the word] and no tube sensation). Amplitube 4 has better sounds - To me !
The only real amp I have is the Jet City 20. And what I heard from the Rig Manager is far from the real one (Testing with the same real cab).
Maybe I had to carved all my own sounds...Quite disapointed