I don't know your TT and phono pre, but at 10 hours my 17D3 (with a Nottingham Spacedeck and Dynavector P-75 II) was a bit on the aggressive side. It got fractionally better over the next 20 or so and then started to relax noticeably. By 50 hours, it was, I guess you could say, singing. It's a very fast, but musical cartridge, worth the wait and very worth the asking price. My two cents. Good listening!
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