My old saying is when everything else fails put an SM57 on it. This has not happened yet. First off, when thinking of a ribbon microphone, you think of a fragile studio microphone. Shure has made these Ribbons to withstand the harsh conditions of the road. We gave these mics no special treatment when it came to handling. We put them in the same case all the rest of the microphones go in. These KSM 313’s are tough. The bi directional characteristics of ribbons are also something live engineers might be wary of. The loud stage I have used the KSM 313’s on this has not been a problem.