As a public service to RO and its potential visitors, I thought I'd research this topic and post a thread explaining the differences between real Shure SM58 mics and counterfeit models. In the last few years, a serious number of fake 58's have hit the global market. This isn't a myth, these fake mics are indeed out there, so here are some things to look for: First off, feel the mic. Genuine 58's are solid, heavy. Real 58's weigh in at around 326 grams. Fake 58's feel light and cheap and weigh-in far less, sometimes as light as 180 grams. All genuine SM58's are now made in Mexico ( there are some real Shure models, such as the Beta, that are in fact made in China). But, if any Shure SM model mic says "made in U.S.A." ...it's a fake. On a real 58, the metal mesh on the ball will have a matte/dulled metallic finish. Fakes will often appear very shiny ... some fakes may even appear to have a chrome-like finish on the mesh of the ball. Just below the windscreen capsule/ball, a real SM58 will always have a wrap-around label with the Shure logo and model number. Fake 58's rarely have this. On a real 58, the silver trim below the ball will be beveled/contoured, on the fakes it is not. Opening the windscreen capsule, real 58's do not have a silver 'warning" sticker that describes voiding the warranty if opened, where the fake models do. Real 58's will have a sticker with a bar code, but no warning label. Real 58's will always use Yellow and Green wires on the inside; fakes will use Red/Black wires (although recently, some fakes have been found with Yellow/Green as well, but most fakes will use Red/Black). On a real 58, the circuit board on the lower half will have a quality control stamp in red lettering. This rarely, if ever, appears on the counterfeit mics. On a real 58, when you unscrew the ball, the threading is silver - on fakes, look for black or dark grey threading. On the bottom of the mic, where you connect the XLR cable, real 58's have both the Shure logo ( not just the word "Shure" but in the same font style as the logo) and the pins will be numbered ( 1/2/3); and the XLR section is one solid piece, whereas fake models will leave off the logo, or the pin numbers, ( sometimes both) and the XLR section appears as a separate "insert" piece inside the body of the mic. Real 58's will always have a serial number, which you can register for warranty on the enclosed paperwork. Fake 58's will often go as far as to include the factory paperwork and warranty card, but there is no serial number included/printed on the box or within the documentation. On a real 58, the bag which holds the mic will have the Shure logo embossed on it, which you can feel. On fake models, the logo is not embossed. Real standard 58's do not come with an XLR cable... (the only Shure microphone that includes a cable is the Shure SM58-CN). If the box includes a cable but isn't labeled with the proper model number, then you may have a fake mic. Also, some fake SM58's come with a switch attached; the model number for this should read SM58S. The "standard" SM58 (with no switch) will be listed as SM58-LC. These come with a mic clip, a strap, and a brass 3/8" clip insert, for use to adapt to any mic stand. Finally, know that some of these counterfeiters are getting to be good at copying the real deals, and are now covering many of the neglected details mentioned above... so in the end, use your ears... real 58's sound like, well, like a 58 should sound - full, rich, nice upper presence without harshness, and can take serious amounts of SPL before distortion ... fakes will sound brittle and harsh with even only low to moderate gain applied, will have a distinct lack of lows and low mids, and will distort easily. FWIW -d.