thanks A440, it is weird - when i use the other mics through an extension lead, they all work fine ~ i have no idea why? could it be the other mics are more sensitive than the tie clip (make unknown) , that there is some kind of interaction between mic/jack and recorder, when all are in close proximity, so that distanced by the extension lead, this effect vanishes? one of the jacks started making noises in the mic, like it was acting as an aerial, at one point - or like micro feedback? extension lead has solved the issue, anyway :] many thanks, Ric