Your combination:AC isolation/condition devices

The choke is another filter, helps very nicely with clarity. Do a search on AA for 193L Hammond Choke.

I've implemented the following chain of PC's for my DAC:

- Jon Risch power conditioner (choke and cap filtering and varistors for surge supression), into
- Jon Risch digital isolation transformer (configured as a step down transformer w/ a cap filter across secondaries into a step up transformer), into
- Felix power conditioner (transformer and cap filtering)

Hell, after all that it probably would have been easier to just get a regenerator from PS Audio. Anyway, it seems to be effective and I definitely hear improvements using all 3, and a worsening if I pull one of them out of the chain.

Enjoy,
Bob

Sounds thorough. Do you know up to what frequency noise is attenuated?

A very good thread with excellant information being passed back and forth!!!!
This was a area I need to invest a few $$$ to increase low level detail and microdynamics.

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