it’s incredible how internally different two microphones of the same model but different years can be! check out these U87s that one of my work colleagues showed me. it’s what on the inside that counts
When using a microphone, PLEASE test it by speaking into it, NOT tapping it.
The part of a microphone that makes it work is a very very thin, fragile skin stretched tight inside the microphone. When you hit your hand against the top (or snap or clap into it), there’s a sharp, strong burst of air that hits this fragile skin. Every time that happens, the vital part of the microphone is weakened and will eventually lead to its breaking.
Also it’s really loud and makes people jump. And it makes me cringe and then start crying inside.
TL;DR: TEST MICROPHONES BY SPEAKING INTO THEM, NOT TAPPING IT WITH YOUR HAND.