I believe that each filter I have implemented addresses different areas of AC noise. I can't say which frequencies, and I don't have an oscilloscope to see just how effective they all are. But I can say that I can hear differences with each one in and out of the circuit.
In general, I don;t think you can have too much filtering on your digital components.
Enjoy,
Bob
In general, I don;t think you can have too much filtering on your digital components.
Enjoy,
Bob