looking at upgrading my tonearm from a triplanar

The Schumann frequency is not actually the Earth's resonant frequency per se. It's the frequency of the electromagnetic wave that is created in the space between the Earth's surface and the ionosphere by lightning and other phenomena. Thus, it's not a mechanical resonance.

Cheers

Go with a Graham Phantom Elite. It is quite the step up from the Graham Supreme. I have two Supremes and one Elite 10" which is my go to arm. I use a 12" Supreme in the rear slot for mono. The Graham also has interchangeable arm wands so you can have a couple carts set up and ready to go save for the need to set tracking weight and arm height which is also easiest with the Graham because of the calibrated bearing tower bubble level.

Ralph, theory is fine, but the fact is that even our mother planet has a resonant frequency. I fear that it's a bit utopian to expect an armwand to accomplish what our planet cannot do (to dissipate all vibrations into heat).

Our planet is supposed do dissipate vibration in a tone arm??
Dang!

Is the Mk.VII Triplanar a significant improvement over the Mk.VI, or merely incremental?

07-23-15: Bdp24
Is the Mk.VII Triplanar a significant improvement over the Mk.VI, or merely incremental?

What a question. Where did you live in the last 40 years? Did nobody tell you that the next model is always better? A total sonic revolution. Even more when it is more expensive? That everyone is honest and able to hear differences, even with units which are well known not to bite the bullet? I knew Dealers, Distributors who were able to live from Love and clean Air but unfortunately they got less from year to year. Does anyone out there knows the reason for? Try to get a good price for the next "upgrade" and you will feel automatically much better. And of course, you will hear something you never heard before :-)