The whole concept of arm effective mass and resonance is only a small part of the overall synergy between a cartridge and a tonearm. This paper goes into the derivation of what effective mass means and how that relates to the cartridge compliance and the resonance calculation - Microsoft Word - tone-arm.doc (cartchunk.org). However, the resonance calculation is actually quite simple, and it does not begin to address the other aspects that @jcarr - the cartridge designer addressed in his post and these are much more complex.
Lyra and OMA
My first endeavor into moving coil. I’m thinking of a Lyra Kleos MC Cart and OMA SUT. Anyone want to speak to that. Please?
Bent