Recommended tracking force range is 1.4 to 2.0 grams. At 1.9 grams you are within the range and probably are fine, but the optimum will depend upon the effective mass of the arm and cartridge combination.
I have the 90x on an OriginLive Incognito Arm on a SOTA Nova V vacuum tt and also have it set at about 1.9 gm. This seems just about right for me. The dealer I bought the 90x from suggested 1.8 - 1.9 setting. I have my VTA set with slight negative rake toward the arm pivot. Using both the Hi-Fi News Analog Test LP and the Cardas Frequency Sweep and Burn-in Record I have found the 90x to be a little finicky (spelling?)with the 90x passing all but the most abusive test the test lps have to offer at the 1.9 setting. I'm still experimenting.
Thanks. Yeah this cartridge is revealing things I never paid attention to before.....and I almost bought a Zyx airy, but my dealer suggested this would provide a better fit for the sound I was after. Actually it was going to be a 901 and a Agon member suggested the 90X. I am glad I listened. I am still curious though about the Zyx/Dynavector. Take care, this stuff never ends.
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