VPI 2nd Pivot for 3D

Raul.... I believe you are correct....that's why the 2nd pivot works so well. ...as to why the unipivots work as well as they do ....if one looks at a bautiful phonograph....even though it is clear and clean, when looking very closely, you'll see that it is made of many dots that all meld as one into that picture.  Many listeners will be very happy with a unipivot on their turntable (I was)....but as you said...in finding and eliminating "possibilities" ..looking for the very best that can be done....the 2nd pivot brings us very much closer to the performance. That 2nd pivot increases dynamic range, widens  and deepens the stereo image, solidifies the low end, stabilizes the images within the sound field, et al.  I'm sure in the future, there will be even more modifications and applied engineering to bring tonearm designs to increased abilities, but for the moment, satisfaction can be found for most people.

   "any tonearm suffers from that torional huge forces but the unipivots are where affects in the worst way to that very hard cartridge job."

Raul I can easily see why you promote this belief because how can you have stability when the stylus is lurching from ambient temperature to something hot enough to melt vinyl and then resorts to freezing temperatures as you claimed earlier? Naturally the expansion/contraction/expansion of the pickup arm as it dissipates this extreme heat and cold must be continually expanding and contracting and expanding and contracting and expanding and contracting and so there can be no stability at all by your reasoning! Also, the "infinitely" tiny stylus combined with the "infinite" tracking force you mentioned earlier must also introduce instability because of the constantly shifting "huge" forces that are twisting the arm! It is amazing any tonearm works at all given all of the extreme forces you imagine are happening with all tonearms! What is the remedy for this Raul weren't you going to invent the ideal tonearm what happened to that effort of yours or are you still struggling with those "infinite" forces? Do please answer we all want to know I think about your efforts in this regard to achieve the perfect way to compensate for thehuge infinite forces.

Dear @stringreen :  "  I'm sure in the future, there will be even more modifications and applied engineering to bring tonearm designs to increased abilities "

I can't say it in better way. Agree with.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.

"  Remember that I'm talking on what we like when listening to unipivots. "

that has an error ( my mistake. ) and must be read in this way:

Remember that I'M NOT talking on what we like when listening unipivots.

R.

@rauliruegas is correct in pointing out that one of the challenges of designing a unipivot is addressing the question of lateral stability and providing for precise and repeatable antiskate. It is precisely these challenges that the designer of the brand of unipivots I prefer (Durand) addresses -- originally via the use of dual magnets to provide lateral stability and adjustment on the Talea and then through the introduction of a precision side bar (aka "2nd pivot") in the Telos and Kairos. The trick with the side bar is that it is engaged via an adjustable sliding weight so that you can set minimal contact force (or more if you so desire). Once this element is in place the rest of it, and frankly the cost, all is down to materials -- and yes the selection of materials in every place on the tonearm does matter. So I’m not surprised that the VPI with 3rd pivot sounds better but surely it would have made more sense to design this in from the outset?

By the way inspired by the video I also closely examined needle drops on both my arms (I have a Kairos for stereo and a Talea for mono) and both go straight down and land with no sign of any wobble 😉