MJ Sharp say that they recommend only using a plug in power type mic because of the possibility of a self-powered mic damaging the unit. But this is causing me no end of trouble because the shops I have tried only seem to stock self-powered which they reckon should be OK (but having returned one unit I'm loth to risk anything). On the other hand it seems rediculously restrictive if I can't now find a mic that matches their recommendation.
What do the Sony's have? Is it optional with them?

Kris