The Yamaha C7 is the most used piano by recording studios. (not an opinion, but taken from a recording industries latest report on what are in the studios here in the US) Out of all the Studios here in the Portland market that have C7's, that has not been a problem. Jim & Richard, No the C7 has a V-Pro plate. Ed Tomlinson >>>>>>>>>>>>>>>>>> Greetings, There are several studios here in Nashville that had to get change their C7's because of "plate ring". Once the producers hear it, it becomes a constant annoyance and the piano goes! They just got other C7's to replace the ones didn't work out, so it is not a problem with all of them. I am sometimes tempted to alter the nose bolts to see if a little flex might change it, but since these are relatively new pianos, I haven't seen any percentage in doing that it, yet. I have not noticed this with any other brands, but that isn't to say that there aren't problems with other. Regards, Ed Foote
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