4kHz notch filter parts values

Dear Audio Enthusiasts,
I have SONIDO SFR175 fullrange speaker, 8ohm very nice unit. But in my environment I need to build a notch filter for it. Could you please help me with starting values for this filter?

The speaker in 4khz range is 7,6 ohm impedance. I need to make a 6dB deep in 4khz, lets say in slope range between 3700-4300

Thank You in advance


2006-09-08 2:04 pm
Something like that: notch depth is adjustable with R3, and the notch width depends on the inductor's series resistance.
C1 needs to be mylar or PP, otherwise the depth will be affected


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