Well, I did some tests on the Global OUT EQ of the Kemper to see how the filter works.
"Trust your ear" is the always valid solution, but I believe that this additional information can be very useful to know, when you have to tweak you Monitor System and/or your PA.
For sure this will help you to understand what you are doing moving knobs ...
The graphs are self-explanatory, I just added the main points near them.
Bass EQ (range -5 +5 equal to -12 +12 dB)
It is a shelving filter that raise or lower from -12 to +12 dB like in the figure below. It start works under 450-500 Hz. Iin the figure, the mid line is with EQ Bass Flat at “0”, the others snapshot are taken at Bass equal to -5; -2,5; +2,5; +5.
[Blocked Image: https://dl.dropboxusercontent.com/u/56839802/_EFFECTS%20PATCHES_/_KPA_Files_/KPA%20TEST%20Global%20EQ1%20Bass%20%2B5%20%2B2.5%20Flat%20-2.5%20-5.JPG]
Middle EQ (range -5 +5 equal to -12 +12 dB)
It is a band pass filter that raise or lower from -12 to +12 dB on the center frequency like in the figure below. The center Freq seems around 500-600 Hz, it works between 100 Hz and 2,5 kHz, the Q parameter of the filter is very wide, under 0,7. The mid line is with EQ Middle Flat at “0”, the others snapshot are taken at Middle equal to -5; -2,5; +2,5; +5.
[Blocked Image: https://dl.dropboxusercontent.com/u/56839802/_EFFECTS%20PATCHES_/_KPA_Files_/KPA%20TEST%20Global%20EQ2%20Middle%20%2B5%20%2B2.5%20Flat%20-2.5%20-5.JPG]
Treble EQ (range -5 +5 equal to -12 +12 dB)
It is a shelving filter that raise or lower from -12 to +12 dB like in the figure below. It start working above 500 Hz, and, with a very gentle curve, reach the maximum after 2 kHz. The mid line in the graphics is with EQ Treble Flat at “0”, the others snapshot are taken at Treble equal to -2,5 and +2,5 (-6 and + 6 dB).
[Blocked Image: https://dl.dropboxusercontent.com/u/56839802/_EFFECTS%20PATCHES_/_KPA_Files_/KPA%20TEST%20Global%20EQ3Treble%20%2B2.5%20Flat%20-2.5.JPG]
Presence EQ (range -5 +5 equal to -12 +12 dB)
It is a shelving filter that raise or lower from -12 to +12 dB like in the figure below. It start works above 2.000 Hz. The mid line in the graphics is with EQ Presence Flat at “0”, the others snapshot are taken at Presence equal to -2,5 and +2,5 (-6 and + 6 dB).
[Blocked Image: https://dl.dropboxusercontent.com/u/56839802/_EFFECTS%20PATCHES_/_KPA_Files_/KPA%20TEST%20Global%20EQ4%20Presence%20%2B2.5%20Flat%20-2.5.JPG]