I’ve always been intrigued by the LP12. Ive never heard one outside of a show, which isn’t really always the best place to make any judgement. Im not a 100% sure on this but I suspect that many recordings, particularly older ones, do have some level of sibilance or overloading of the mic when the singer lets go and more accurate cartridges and phono stages can pick this up where less detailed equipment can mask it. It can be hard to distinguish this from a worn cart or other issues though.