Are linear tracking arms better than pivoted arms?

Dear Dertonarm: Like you I agree ( I posted several times. ) that the cero tracking error advantage on linear trackers in this imperfect analog world could means almost nothing against the less than 2° error in pivot tonearms design.

Till today I always support a pivot tonearm over a linear tracker at least for the better bass quality performance that btw Atmasphere, you and me point out through the thread.

Now, no one and I'm reffering to M. Lavigne, F. Crowder, Atmasphere or A. Porter deny if there exist more cartridge stylus/cantilever/suspension stress through a linear tracker than a pivot design, otherwise they give cartridge names, how many years and which linear tracking tonearms where they don't detect any cartridge quality performance problem cause by that " stress " we are talking about.

The argument that you posted where you say that over the long run/time we can't aware of that cartridge quality performance degradation due that is at minimum day after day and we can't detect it is no clear argument at all because you have to take in count too the normal cartridge deterioration because of time even in a pivot tonearm.

How I can see all this controversy, some one posted here: ++++ " Theory is mere speculation. " +++++

yes till you prove it and you know this.

The controversy could comes because the theory and common sense tell me that that " stress " exist what that theory can't explain ( because your model is only a part of the whole model neccesary to prove it. ) is how exactly shows it self through the cartridge life: after three months ( in hours. ), after one year, after 3 years, how change the cartridge frequency response due not only because the normal over time cartridge degradation but in specific for that additional " stress ", how change the cartridge crosstalk between channels, how the suspension/cantilever behavior/stylus shape changes due only for that additional " stress ", which is the impact with different cantilever size, with different stylus shape, with different cartridge compliance values, with different LP recording velocities, with different room temperature, etc, etc

IMHO I think you don't have answers ( and I don't asking for. ) and I don't know any one that could have the precise theoretical answers and even if they have ( in theory ) this is only half the " true " because you have to prove it ( the other half ) through a controled experiment/tests in real time. Very complex for say the least!

In the other side those gentleman has an answer ( Dertonarm, it is not only one person but more than that. Are they all wrong? could happen that they speak between each other before they posted?: no Sir I don't even imagine that! ) that they can prove it through its subjective/empirical experienced/knowledge each one has.

So, the " stress " exist: how affect the cartridge quality
performance over time?, who knows!!!

Regards and enjoy the music,
Raul.

03-11-10: Mepearson
As far as cartridge manufacturers giving us any meaningful info on this debate, I am old enough to be cynical enough to think that we couldn't depend on it. Aside from the issues that manufacturers may have no idea what type of tonearm was tracking their cartridge before it was sent back for a rebuild, politics and money are pervasive in everything. Even if it was true, I don't know that cartridge manufacturers would tell you that using a linear tracking arm will shorten the life of your cartridge. Not only do they have to worry about lost sales to potential linear tracking arm customers, they would also most likely incur the wrath of linear tracking tonearm manufacturers.

My experience with most manufacturers of a wide range of audio components has found most of them to be fairly straightforward, if not strongly opinionated, about what does and does not work best with their components.

In the case of Grado, I was up front that I already own their "The Statement" cart(w/ low hours) and both a quality linear and pivoted arm, my only concern was with doing premature or unnecessary damage to it. The was clear there was no sale to be made, regardless of his view.

I don't know about others, but whenever I talk to a manufacturer/dealer/repair person, I always make a point of telling them exactly what their product will be connected to. It would be foolish not to, just in case their is some relationship between it and a current, or future, problem. So far, I found almost all to give warning where a potential issue could arise, some have even recommended against buying their product because of incompatibility or problems. I have certainly been told when a cart IS NOT a good match for a tonearm and to look elsewhere.

But, to minimize your valid concern in the future, I suggest others who may contact manufacturers/retippers on their continent do so with those whose products they already own and make clear that it isn't a potential sale inquiry, but rather one of maintenance/longevity.

I suppose a linear tonearm with a very short wand will have lower effective vertical mass than any pivot arm. Such a linear arm may place less stress on cartridge suspension relative to a pivot arm. The horizontal mass of a linear arm will always be greater than a pivot arm. However the friction/stiction of an air bearing is less than a pivot. This advantage might at least partial off-set the disadvantage of relatively greater horizontal mass.

Can anyone comment on these linked variables of vertical mass, horizontal mass, and friction as they collectively bear on cartridge wear, or for that matter, on sonic performance? Is there a threshold of low horizontal mass on an air bearing arm, beneath which stylus wear becomes an irrelevancy? For example, Trans-Fi has horizontal mass on order of 85gm.

So many variables and so little time.

Mepearson :I already said that the scientific way (controlled experiment) was best in this matter. Only In its absence I suggested that each of us be the judge according to the evidence presented. I do not see how your hatred of the jury trial process (heck, we all hate it) has any relevance to the subject at hand.
All I have by way of evidence is my personal experience with one tonearm. Since my experience is at variance with the theory advanced, namely that my cartridge life will be shortened and my sound distorted ("poor performance and quicker wear of the cartridge"), I simply want some proof. I am open to your suggestions of how to solve this problem.