Kemper Profiling Amp Guide
For detailed information about the KPA, see WiKPA. This guide is a slimmed-down of the information there, presented in a more straight-forward manner for someone who is learning to use the unit. Also, Kemper's manuals provide very good information, available on their downloads page (There are actually 3 manuals - a Basic one, a Deeper/Reference one, and a MIDI Reference). Finally, the Kemper forum is a great community that is relatively calm and helpful compared to the fanboys on other manufacturer forums. It provides good info about available free and commercial rigs, troubleshooting issues, discovering bugs, and helpful tips.