High Performance Low Mass Tone Arm Suggestions Needed

Alternative Dynavectors that work on your SOTA would include DV501, 507, and 507 mkII. Or any tonearm with effective mass less than 12 or so g, based on my experience with the Triplanar. Going from the theoretical optimum of 5g to 10g would only decrease resonant frequency by 20% or so. That’s one reason it works. Another is that one doesn’t know the actual compliance of a representative sample of any particular cartridge, let alone one that may now be 30 years old.

“A substantial counterweight “ might wreck your chances for low effective mass unless you mount it close as possible to the pivot. I’ve had good luck with my Dynavector DV505 and my Triplanar and the MC2000. But if you’re religious about matching compliance to effective mass, J Gordon Holt once pointed out you’d need a 5g tonearm with the MC2000. In practice you’ll probably have no problem with any of the above.