I would like to build a passive band-stop filter for my earphones. I recently had some help from the user "Andy aka" with designing that type of filter and he also pointed me to the LTSpice application for running simulations.
After playing with some values, I think I have what I want, but i have a few questions before I go and purchase the necessary components.
Here is the circuit:
And here is the list of components from mouser:
I would just like to know if I'm missing anything or if these components and graph look correct?
I want to cut the 5800-6000hz region by roughly 7.8-8db with a Q between say 14 and 17. The resistor R2 in the schematic is there in place of an adapter I will connect at the earphone jack (R3). This is because my audio interface is 32 ohms. If I use the filter on that interface I remove R2 and the values of the graph remain the same. When using a 1ohm device like my portable amp, the adapter brings the graph values back in place.
I just want to verify that this should work and I have all the components I need. I added an extra components as a fail safe. :-P
Also, are any of the other values critical with the components? I tried to get the best tolerances I could for each and the highest reasonable power handling...