When you say 'MM' do you really mean it to be limited to MM or can we include MI (Grado, Soundsmith) and H/O MC (Hana EH, SH, Sumiko Blue Point #2, Dynavector 10XL)?
All those are roughly comparable to the Ortofon 2M Black or Bronze, and don't require additional step-up devices.
All those are roughly comparable to the Ortofon 2M Black or Bronze, and don't require additional step-up devices.