Rabco SL-8E Tone Arm

all technical things aside these arms when setup + working like they did when new... play music period! most others can only dream of...top to bottom they are excellent IMO...I have several including a highly modified balsa wood armwand one that has censor switch instead of the mechanical one...

Lawrence
Musical Arts

Dover, You wrote, "The Dynavector arms use the same electromagnetic horizontal damping to counter the high horizontal mass in their biaxial design."

Actually, the DV tonearms are some of the pivoted arms I had in mind when responding to Ralph that do deliberately employ high effective mass in the lateral plane, as you say, but do you view the magnetic device as a way to "counter" high lateral effective mass or as a way to dampen resonance in the horizontal plane? There is a distinction to be made. I always thought that it was to dampen resonance. I've got a DV505 and am a big fan of it.

Hi Lewm,
I'm guessing on the Dynavector, but I would assume that although the Dynavector has a high mass in the vertical plain, because it is a balanced beam, ie the counterweight at the back balances the arm to zero, then they have added electromagnetic damping to minimise excessive overshoot of movement on eccentric records. One thing I know, their argument for high horizontal mass/biaxial design is that the inertia of the heavy beam provides better bass as you have alluded, so I guess the damping may be an extension of this thinking.
Certainly on the ET I have to turn the volume down when the e/m damping is applied, which is quite astonishing to think that excessive lateral movement can affect the audible or dynamic output to that degree.

The thinking 'behind' the new Morch 8 tonearm from Denmark
is also connected with the 'horizontal mass' . If I grasped
the description well(?).