I am trying to make a bandpass filter around 300Hz using this circuit. I have calculated the values of the components using the equations shown in this website assuming low frequency cutoff 160Hz and high frequency cutoff 480Hz.
With the equations you get values of RC. So I thought I could select the resistance and capacitance as I wish as long as RC gets the right value.
But when I choose R2=3300 and C2=0.1u frequency response is fine.
Why does one work and the other does not?
PS: I am using a LM358 operational amplifier.