I was going off the few pages I read, including the one I linked. I'm far from an expert in this realm, so, really, I don't have any substantial argument for or against what either of us are saying. However, filmography, and the related foley artistry, has always intrigued, and I have learned from experience the differences between using a standard jack and an XLR, and I can say that the sound is vastly cleaner with XLR (at least on a set). The secondary jack on this phone seems to be to XLR what USB-microB is to USB-A (again, going off what I've read). You do make a lot of sense, though, in your posts, so I may be flat wrong here haha