Polaris Notch Filters

I’m trying to figure out just what exactly the Polaris notch filters types A-E do (the manual doesn’t say anything). My understanding is that a notch filter removes a (narrow) band of frequencies. Are these notches actually boosting a band? I’m also wondering how Q and cutoff affect the types.

Yes they remove a band of frequencies. Q sets the width of the notch, higher Q is narrower. Cutoff controls the center frequency.

Thanks! So do the types also move the center frequency?

Yes, but they also change the curvature / symmetry of the notch. There’s some diagrams in the “Frequency Responses” document on the product page


This is perfect, Kamil. Thank you!