AF1, EMT 927, AS2000 with SAT, SME 3102R, Acoustical Systems tonearms and most of the best MC carts available.
http://zero-distortion.org/cessaro-gamma-techdas-af1-premium-emt-927-american-sound-sme-3012r-many-carts-much-more/ .
SAT 30K+$$ TONEARM: W O R T H T O H A V E I T ?
from your Stereophile review the SAT specs are as follows: P2S: 212.2mm, overhang: 22.8mm, offset angle 26.10° with an effective length: 235mm.
Those numbers tell us that you are listening ( with any cartridge. ) way higher distortion levels, that you just do not detected even today, against almost any other tonearm/cartridge combination.
Obviously that the SAT needs a dedicated protractor to make the cartridge/tonearm set up but we have to analize what those specs/numbers has to say:
the SAT maximum traking error is a really high: 3.09° when in a normal ( Jelco or Ortofon. ) 235m Effective Length tonearm Löfgren A alignment ( IEC standard. ) is only: 1.84°
the SAT maximum distortion % level is: 2.67 when in that normal tonearm only 0.633
the SAT average RMS % distortion is: 0.616 when in normal tonearm only :
0.412 ( Löfgren B even lower: 0.37 ).
All those makes that the linnear offset in the SAT be 10mm longer than in a normal tonearm ! !
All those are facts and you or Mr. Gomez can’t do nothing to change it. Pure mathematics reality.
You posted in that review: """ Marc Gomez has chosen null points of 80 and 126mm instead of the more commonly used 66 and 121mm. """
that’s a deep misunderstood on tonearm/cartridge alignment input/output calulations in the overall equations used for that alignment:
NULL POINTS WERE NOT CHOOSED BY MR. GOMEZ BUT ARE PART OF THE OUTPUT DATA ON THOSE ALIGNMENTS CALCULATIONS.
In the same is not true your statement: """ the more commonly used 66 and 121mm. """
that " commonly " just does not exist and only depends of the standard choosed for the calculations.
There are several other things in that SAT design that not only are not orthodox but that has a negative influence in what we are listening it:
he said that the tonearm owner can change the bearing friction levels and this characteristics could tell to you that’s a " good thing " but it’s not but all the way the opposite because makes not a fully 100% steady bearings.
Ask you a question?: why the best top cartridges use cantilevers of boron and not carbon fiber, it does not matters that laminated carbon fiber the SAT has.
Carbon fiber is way resonant no matter what. In the past existed cartridges with CF cantilever and sounds inferior to the boron ones. ....................................................................................................................................................................... the designer was and is proud that the tonearm self resonance happens at around 2.8khz, go figure ! ! !. It happens way inside the human been frequency range instead to stays out of that frequency range. """"
Dear friends and owners of the SAT: way before the mounted cartridge on it hits the very first LP groove and against any other vintage or today tonearm you have way higher distortions that per sé preclude you can listen a real and true top quality level performance and does not matters the audio system you own.
What we can listen through the SAT is an inferior quality performance levels with higher distortions. Obviously that all reviewers and owners like those heavy distortions but that does not means they are rigth because and with all respect all of them are wrong.
Some one send the link of what I posted to the SAT designer and latter on ( I do not knew he read my post. ) I ask for him for the information about the effective mass of the SAT. He gave me a " rude " answer and did not disclose that information that in reallity was not important in that moment.
I have to say that at least two professional reviewers bougth the SAT tonearm., both with the Continnum/Cobra TT/tonearm. At least one of them say the SAT outperforms the Cobra one ( maybe both, who knows why bougth it the other reviewer. )
The credentials of the SAT designer are impecable and really impressive ones but no single of those credentials speaks about audio and certainly not on analog audio.
He is a true " roockie " enthusiast ( and I say it with respect.) and obviously that is welcomed in the high-end " arena/area/ring " where all of us are learning at each single day. Any one that’s marketing an audio item has a true merit and this is not under discussion: SAT designer has his own merit for that.
You that are reading this thread permit me to ask: what do you think, overall, about?, at the end audiophiles are the ones that has the last " word " or should be that way.
Regards and enjoy the MUSIC NOT DISTORTIONS,
R.
Here we have a report on Tang's wonderful system where you can read yourself on Ked's views between AF1, EMT 927, AS2000 with SAT, SME 3102R, Acoustical Systems tonearms and most of the best MC carts available. http://zero-distortion.org/cessaro-gamma-techdas-af1-premium-emt-927-american-sound-sme-3012r-many-carts-much-more/ . |
Henry, John is a mechanical engineer. I don’t think he has a degree related to electronics. Yes, he knows more about tonearm geometry than I or anyone else on VA or here. Period. If we must get into a pissing contest about who knows more about what, I will only say that as a real life biological scientist, I did also study physics, chemistry, and math, and I have built amplifiers and preamplifiers from scratch, based on my own self-taught skills. In any case, the subject at hand requires only algebra using Ohm's Law and the formula for the reactance of a capacitance. I guess it's fair to criticize my post for not noting that John did incorporate an estimate for the resistance of "a connector". (I stopped reading his post mid-way through it. Mea culpa for that.) My calculation for the resistance across 4 feet of 33ga wire, based on internet acquired data for resistivity, is 0.824 ohms, a bit less than your quote from John, and this is assuming copper wire. It would be a tiny bit less for silver. One question that arises is, why must we use 33ga, if we are fretting about resistance? One could use a heavier gauge, if that is such a concern. And finally, do you (and John) really think you are hearing the difference between ~1 ohm (for a straight 4-foot shot with 33ga wire, using either his or my slightly lower estimate) and around 0.5 ohms (for his estimate of the sum of various wires plus connectors)? As far as my "mumbo jumbo" is concerned, no specific calculation for the effects of connector inductance and capacitance is possible, because we have to know specifically what products are being used. Anyway, one man's mumbo jumbo is another man's good reason to do something. You haven't even offered mumbo jumbo; you've just declared a position and dared anyone else to knock you off it. In the end, I have no desire to change your mind. You do what you like, and I’ll do what I like. For me, the best connector is no connector, whenever practical. And by the way, you’ve ignored the bit about grid- and gate-stop resistors. Like everyone else, I too enjoy the convenience and cartridge-matching possibilities afforded by interchangeable headshells, but I approach the problem with an acknowledgement that I am accepting some small compromises, when I choose that method. I do choose it with alacrity for MM/MI cartridges, as noted. |
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Dear Lewm, On a note of clarification, when you say that you did a comparison of single-loom vs “connectors” was this conducted with e.g. a fully hard-wired version of a 3012 so that it would be closer to like-for-like conditions. Alternatively are you saying it was e.g. 3012 vs Triplanar? If the latter were the case it would hardly be a fair comparison and you’d be unsure whether to attribute the difference to tone arm design or wiring (or am I misinterpreting your thoughts)? (...or misread the post?) Kind regards, |