A couple of years ago I noticed records with "320" stamped on the matrix sound better than others. Recently I learned from a video of M. Fremer that 320 is the serial number of the Neumann lathe it's cut on and mastering facility is the tape vault of major labels in Hannover/Germany. I don't know if mastering facility is still active and what they do for impressive cutting quality but it's sure they sound great. Did anybody come across "320" or know anymore details?
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