Quote Originally Posted by alcarmichael View Post
Why do you say 'especially when not true'?
Here's a quote from the link in post #2

"In my experience, every active moving coil input stage degrades the sounds way too much. While it is possible to do active stages today, which have practically no detectable noise, it is the bass region and the bass quality where the problem lies. Active devices are drifting with temperature, operating point and under work, and if input signals are smaller than 1mV, the drift gets into the way of the music. Bass lines are muddy then and drum players seem to play like if they are drunk. So the music is lacking immediateness, and rather sounds hollow, uninvolving, uninteresting."

Convincing people like that that headamps are superior to SUTs is going to be a hard job. Of course, there's been a similar debate for years about valves and transistors, and things like distortion measurements don't seem to have any impact on the debate.
Anyway, to some people it will be true that SUTs are superior to active headamps. To others it won't be.
Personally, I think good examples of either technology can sound great. Bad examples of either technology don't.