Thank you again for your kind reply and the time to take a look at my issue/plan.
Well, the idea would be the following:
There are two values which need to be determined depending on "S" and "Qbp" values.
fL is the low frequency roll-off, and fH is the high frequency roll-off.
The formulas to calculate those are these:
fL = Fs / Qts * (fL factor)
fH = Fs / Qts * (fH factor)
[Fs and Qts is given by the manufacturer of the speaker]
So there would be 2 dropdown list. One is "S" and the other is "Qbp".
For example if i would select "S=0,6" then the "Qbp" list would start with the "0,5258" - column and below.
Then selecting a value from the "Qbp" dropdown would give an automatic value to "fL factor" and "fH factor" cells. So making another automated calculations for other values as well. But these values are the bases for almost all the parameters.
Thank you for your time, but i don't want to stress this out too much, since i don't know if this would be possible at all.