My Shelter 901 took ~80 hrs for break in, it's sound is getting better and better.
I would just set the cartridge in parallel to record until cartridge has at least ~50hrs on it(same for the loading, run it at 47k until cartridge has ~50hrs on it).
Initially, changing VTA did not yield significant changes in the sound. But after break in, I like the sound of it when it is slightly tilted back(very slight) with 1.8gram VTF.
Also I messed around with cartridge loading initially and ended up staying at 47k(becasue before cartridge was broken in, any loading under 10K yielded somewhat of muffled/congested/lack of dynamic). After ~80hrs, I tried the different values again and now I'm running at 200 ohm.
I would just set the cartridge in parallel to record until cartridge has at least ~50hrs on it(same for the loading, run it at 47k until cartridge has ~50hrs on it).
Initially, changing VTA did not yield significant changes in the sound. But after break in, I like the sound of it when it is slightly tilted back(very slight) with 1.8gram VTF.
Also I messed around with cartridge loading initially and ended up staying at 47k(becasue before cartridge was broken in, any loading under 10K yielded somewhat of muffled/congested/lack of dynamic). After ~80hrs, I tried the different values again and now I'm running at 200 ohm.