I have 3 of these and find them useful. The switch as I remember adds "damping" to the line. I don't know about it but perhaps Joe Abrams can clarify. I have found the position where the rocker is pressed to the left is always better in my system. They add value in my reference Spectral/MIT system.
MIT Z-Stabilizer - original with two-way switch on front - anybody know why two settings?
There is clearly a difference in sound when you switch between settings on these funky old units. Anybody know what is the technical difference between the settings? Seems illogical to choose between, "clean power" vs "even cleaner power"?