Re: LPF question

Posted by Alamondm on Oct 09, 2021; 12:36am
URL: http://guitar-fx-layouts.238.s1.nabble.com/LPF-question-tp50267p50282.html

I’m in over my head here. I do not know how to calculate the formulas. I didn’t take that kinda of math, more of a geometry guy. I can somewhat understand them but not enough to calculate.
I checked the specs on my bass cabinet and it has a range of 35Hz to 14Khz.
My intention was to keep both pots at 50k, change c3 to 2n2 and change c4 to 15n but that doesn’t give me the results expected. I have been using an online passive RC LowPass filter calculator. So I’m only calculating 1 filter at a time.
I assumed that the R/C and potentiometer worked independent of each other but now I see that’s not the case. I give up and humbly ask what are the values for the 250Hz 22Khz sweep. Maybe if I know the answer I can work backwards and figure it out for the future. I’m an old construction guy trying to learn something new. I did google how to calculate formulas but all that got me was a bunch of Excel spreadsheet stuff.
Thanks again
Matt