Vasillios. If you are using REW, this software creates the filters for you so all you have to do is enterthe numbers into the bfd and you're done. I was quite surprised that the predicted response was pretty much exactly what I got.

I would imaging doing it manually would be an itterative process. You would have to figure out the center fewquency, amount of cut or gain and the Q.

Fred

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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!