Mr. Sphere, So if the volume control is connected to the first stage of an amp by a few inches of wire that is OK, but if it is connected by a few feet then that is bad? I don't buy it. The difference in impedance of 3 feet of wire vs. 3 inches of wire is negligible.
Maybe, and that is a big maybe, at the very lowest volume settings it will come into play, but if you are operating down there most of the time then the system has too much gain to begin with.
And even though I'm sure you are a stand up guy, and many people here know that you are a mnaufacturer of active, balanced preamps, it should be disclosed so your advice can be properly evaluated. I'm sure if Mr. Placette answered this question we would get a completely different response.