Kemper KPA System and Rig Settings
The KPA has system settings that apply globally as well as rig settings that are saved per rig (patch). These can be accessed by pressing the "System" and "Rig" buttons, respectively.
Contents
System Settings
LFC (Low Frequency Correction)
Starting in FW 2.5 (?), the KPA included this parameter. It is extremely useful for metal tones where there is lots of low-end frequencies, especially on mutes. Essentially you get more/tighter bass with LFC turned on. If you look up older A/B comparisons of the KPA profile vs. the reference amp for metal tones, you can usually notice that the KPA tone sounds a bit brighter/thinner than the reference. Newer comparisons using LFC are virtually identical.
The parameter is a little confusing because by default LFC is turned on. There is a checkbox to turn it off called "LFC Off". So, if the checkbox is checked, that means LFC is turned off, and the KPA will function as it did before FW 2.5 (?).