Discuss The Viv Lab Rigid Arm

And my point, which apparently you are intent upon ignoring, is that the theory would predict that the Viv should sound grossly distorted (your term) compared to any decent overhung pivoted tonearm with headshell offset, and it does not, in my hands in my system to my ears. (And also apparently to many other pairs of ears.)  That proposition leaves aside the question of whether the Viv is better or not, compared to conventional tonearms. You are cordially invited to come have a listen, if you happen to be in the Washington, DC, area. 

From now on, I promise to credit Lofgren and only Lofgren with the algorithm that led to modern pivoted tonearm design. I don't care who gets the credit, and it has nothing at all to do with the issue at hand.  That is what I meant by having no dog in that fight.  It's an aphorism used by native English speakers. My real point is that his work was to solve the problem of how to minimize TAE with a pivoted tonearm. That's purely a question of geometry. 

The most recent challenges are based on the very obvious differences in the Geometries selected.

As said before I have received enough information through this Thread to have been stimulated and influenced, resulting in the request being made to a Tonearm designer to incorporate a underhung design into a upcoming comparison and evaluation of Tonearms.

Even when the Geometry of the New Design Tonearm is one that is very closely matched to the 'Viv', the experience will not in any way allow for assuming the Tonearm resembles the 'Viv' in use. There will be quite obvious differences in the Mechanical Interfaces used for each design.

What will be learnt is how the conventional Geometry used on a Tonearm of a particular design, compares to the same design Tonearm with an alternative Geometry.

I am today, as a result of having encountered experiences gathered over the period of multiple years, left with a certainty that when Tonearms are experienced in use using the alignment Geometries from Lofgren, Baerwald or Stevenson, it is neither of these alignments that are responsible for showing out the noticeable differences that can be detected between presentations.

Setting to one side the variations of Cart' and devices in use for a system, that can easily be suggested as accountable for a producing a noticeable difference, there is also the Mechanical Structure of the Tonearm and the methods used to produce the Mechanical Interfaces in a Tonearm.

I am today very interested in Tonearms that have been designed to be with a extremely low friction impact on the mechanical interfaces, the Tonearm I have in use at present has many man hours required to create this condition. 

I can't but help feel that the positive impression being made from use of the 'Viv' by @lewm, is additionally influenced by experiencing a Tonearm with an alternative Mechanical Interface, inclusive of methods for transferring/dissipating energy not seen in a conventional design. 

 As for Geometry options, I am using for more that 8 Years and remaining contented using the Stevenson Geometry.

I don't feel the need to revisit any other similar Geometries as means to replace Stevenson, but do like the idea of experiencing a Geometry that is quite different in concept.   

Pindac, what you want to do, which is a logical way to compare overhang to underhang, seems to have been done by Intact Audio with a Schroeder tonearm. Perhaps Dave (aka Intact Audio) can say more. I think the headshell is held at an angle, on some Schroeder tonearms, by a single screw, making it easy to set offset to zero. Then you’d just have to move the pivot back away from the spindle to achieve underhang.

@lewm  : "  the theory would predict that the Viv should sound grossly distorted (your term)  "

Not really a theory but imagination of some gentlemans.

R.

I don’t understand your last post.