In addition to answering the question about mixing different types of mics, has anyone had any experience with the Shure SM55SH - the vintage 1950 looking mic -- with supposedly the same electronics as the SM58 ? Our group would like to experiment with using just one mic for our four vocals, like the old bluegrass groups, weaving the instrumentals in and around. Does this SM55SH have an omni or cardioid pick-up pattern to enable this, and will it handle instruments, etc. I've been told by some sound men that the feedback on a single mic set-up is severe.

It's a bit pricy to just buy for experimentation, and I don't think any of the shops here rent them. I've heard one negative comment from an electric bass player, but he was not too clear what the problem was. ?!?