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Mark is correct, the equation is the equation

effective mass is the moment of inertia.

The tonearm manufacturer's you mentioned are not trying to get to the highest possible moment of inertia.

They are selecting a moment of inertia which best works with the cartridges likely to be utilized on their arms.

Or as we call it "Matching" at cartridge to an arm.

Garth, I hear great things when I reduce the headshell mass in terms of inner detail and transient response. But as I increase headshell mass the midrange becomes more fluid and puts meat on the bones.

I think Mark was correct when he said that there is probably an optimal effective mass for a tonearm. That said, there are a bunch of different cartridges out there and my Grado sure sounds a hole lot better everywhere with a low mass tonearm.

Cheers!


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  • Mark is correct, the equation is the equation - tubesforever 11/18/0518:09:18 11/18/05 (1)


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