X-sim 3d bandpass filter

[WhiteRhino]

What is the turn frequency and the bandwidth ?
For example in this picture , in this adjustment what will be actually the cut off of the HPF LPF in this bandpass ?

 

[AllenB]

Do you need to know this? These frequencies can be calculated but then they are combined with your response so it changes. You could look at the -3dB or -6dB points and estimate the slopes.

Even better you can work to a target response.

 

[WhiteRhino]

ok I understand here is the formula .