Jwm, the varying input impedance of the stunt stepped Shallco is a real non issue based on my experience. The sound quality improvement of only one resistor and one switch in the signal path etc....is much more important. One can also place a larger input to output value resistor if concerned about source matching.
I converted my stepped Attenuator to a shunt step and love the sound quality improvement. I use digital front ends only and find this is an non-issue. You would need to determine your phono front end output Impedance to determine if it is a potential issue with your phono stage.
I don't use phono stages so I really don't know.
I converted my stepped Attenuator to a shunt step and love the sound quality improvement. I use digital front ends only and find this is an non-issue. You would need to determine your phono front end output Impedance to determine if it is a potential issue with your phono stage.
I don't use phono stages so I really don't know.