SteveG said:By subtractive, do you mean it dosen't use feedback to filter?
I was wondering if it was possible to create a crossover that would work like some riaa type phono preamps- buffer the input and drive a passive filtering stage and then an output stage. Is this possible, and if so where could I find out about it? I don't like the idea of multiple complex IC op amp feedback filter circuits in series in the signal path.
jam said:If you go to the Pass Labs web site you find the article on the x-over. The only drawback to this type of filter is the derived slope is only 6db per octave.