What DYNAMICALLY BALANCED tonearms do you know of?

[Publius]

A "dynamically balanced" tonearm is one where, in the absence of other forces, the counterweight is tuned to balance the tonearm to be perfectly level. Another force (that is non-gravitational in nature) applies the VTF. Usually, this is a spring.

Examples that I know of include a lot of SME tonearms, including the IV and V, the Dynavector DV-505, and IIRC a couple Micro Seiki tonearms. Tonearms that are NOT dynamically balanced include anything whose VTF is set exclusively by the counterweight, and all Rega tonearms (they use a spring, but only to reduce the counterweight VTF, not to eliminate it).

Can anybody think of some others?

[Don C]

My Fidelity Research FR64Fx is balanced.

[JBStephens]

JVC QL-Y55F, tracking force applied by some sort of servo system. And it sounds mighty good.

[TONEPUB]

If you are patient, you can set the Rega spring to zero
and just set the VTF with the weight....

Sounds a little better that way!

[drh]

I think all the old Dual idler drive tables featured stock arms with dynamic balancing--certainly the 1009F and the ones in the 12xx series did.

[John Buchanan]

Linn Ittok, Linn Ekos, Breuer, Sumiko "The Arm"

[Metralla]

Linn LV-X, the arm on the Dual 505 MkII