Yes, I understand the link you provided, but, don't understand about "normal situation". It dosen't take into account for the room acoustics.
You can always turn the knobs down to your desired sound level, it has nothing to do with how much power you put into the loudspeakers. Proper gain structure is also important.
For my 4429 and the setting I have in my Crown DCi LevelMax Limiters is like this...
RMS Threshold (V rms) at 35.0 Volt
Thermal Voltage at 49.0 Volt
According to my specs of 4429, 200Watts RMS
https://www.google.se/url?sa=t&rct=j...85076809,d.d24