Everybody knows that MC cartridges have different outputs. I own
Ortofon MC 2000 with 0.05 mV output , EMT with 1 mV and many
between 0,2 - 0,4 mV. In such case there is no ''one phono-pre suits
all''. But there are phono-pres with different amplification stages.
Both my phono-pres; Basis Exlusive and Klyne 7PX3 .5 have 4
amplification stages. The ''rule'' is ''the higher amplification =
the higher distortions''. So one should choose the lowest amplification
for the given cartridge.