Correct EQ center request

Back in 12/2020 I had asked if anyone knew what the stack frequency centers were as well as Q if known. Looking back and searching I find some conflicting data. Does anybody know (maybe from Kemper) what they are for sure?

User Lightbox reported :

Bass: Center frequency: 75HzQ factor: 0.25

Middle: Center frequency: 640Hz Q factor: 0.33

Treble: Center frequency: 7000Hz Q factor: 0.2

User JuLai reported:

Bass Shelf 150 Hz (steep)

Mid Peak 600 Hz

Treble Shelf 2400 Hz

Presence Shelf 10000 Hz

Others have posted some info as well that didn't match either of these posts. I'm interested because I like to know what I am controlling for reference.

I realize that there may be more going on than just a center freq at a set Q going up and down. That being said I would think this would be pretty standard information but seems to be a bit of a mystery. It took a bit of searching to find the accurate info for my 1983 800. I even surprised a area "expert" when he was convinced the presence was the highest freq but actually it operates more in the mids!

Thanks. I must be lousy at searching because I can rarely find what I am looking for . I typed in Stack EQ figuring this has been spoken about and I was hoping to find an answer from the factory. I probably read this before because I recall the interactive controls playing a factor so it's not dead set narrow/steep/bandwidth.Interesting seeing the graph, thanks again.