Do you know what “SM” stands for? Do you know the actual difference between an SM58 and an SM57? Considering that we’re talking about the industry standard in vocal mics, it’s probably worth having a look at this article on the Shure blog. It was written by Shure Historian Michael Pettersen for the 50th anniversary of the SM58. Also, on the same site there is a very enjoyable webinar about the history of the mic, and how this piece of history in live music and recording was shaped.