Well, the Shure SM57/58 is an example of a relatively inexpensive balanced device that produces neither a high current nor a high slew rate output - and performs quite well well with *very* long cable runs.
Geesh I guess I should have said active.
I was referring to things with active drive stages and
microphones including condensers with phantom
power were not included.
But find me a microphone that I can connect directly
to a power amplifier with a long XLR line and
I'd be willing to include microphones in the
argument also! (Shure Vocal Master doesn't count

")
They may actually make such a beast for all I know.
