Another “How to choose an arm” question


I currently have a Sota Saphire running an SAEC We317 arm (221mm spindle to pivot and 12 mm overhang).

That is running a Garrott Bros p77i, but I have been looking at some LOMC cartridges, as well as SoundSmith LO-MI, AT ART, etc.

How is one supposed to determine their current arm is good or not?

It sounds fine and I would think that the knife edge design is not prone to a lot of wear.
However it was recommend that I upgrade the arm… But how would I know “to what”, and how would I know if the upgrade is worthwhile?

I was looking at some DD tables to have a more expanded choice of arms that can be mounted, as the Sota is a bit restrictive in that regard. That is still on the cards as a possibility… however assuming that the Sota is a keeper, then how do I determine the arm’s adequacy, being “fit for purpose”?

128x128holmz

As you suggest it would be much more efficient to just get a new cartridge. A low compliance Soundsmith would work great. The Sussurro mkII is the sweet spot in that part of the line. This is a much superior cartridge to any of the Hanas. It is very neutral and tracks great.

I have 49 dB of gain available, and the SS sheet on that cart says recommended gain=58-64 dB.

There is also a SUT with 11 dB of gain which would bump me to 60dB…
But can one even use a SUT on a MI or MM cart?

 

Good info on awaiting the ECLIPSE... and more waiting is OK.
They also said that a 230v version would be a bit longer. That was maybe Aug.Sep last year, and they anticipated Feb 2022… I assume that most things run behind with the global transport etc.

 

The Sussurro was apparently Schroder inspired.
I am using a DIY alloy plate for the arm board, so I should remove it and weigh it.
I do not recall if I removed any weights (or if there were any) in the pockets at the corners… so I’ll ask Christian in a week or two.

On using a SUT with an MM or MI cartridge, generally the answer is no. The one exception is for a low output MI that also has a low internal impedance, which I think describes the Sussuro.

@holmz , Frank Schroder and Peter Ledermann have been friends for a long time. Peter's demonstration rig has a Schroder Reference Arm on it and there must have been 4 or 5 other Schroder arms hanging around when I was there. 

I am not sure about a transformer with Soundsmith cartridges but you certainly do no have enough gain for a Sussurro. But, what you do have enough gain for is The Voice which is nothing more than a high output Sussurro. Same stylus, same cantilever same drive mechanism. The only difference is the coils have more windings and the compliance is set higher which is the problem for you. At 22 um/mN it might be too soft for your arm. It works perfectly in the Schroder CB. Using the Certal plate I get a horizontal resonance frequency right at 8 Hz. 

With a larger arm like that you really need a Phono stage suitable for low output cartridges. There are several really good high output cartridges out there but the majority of them are mid to high compliance. I think the Nagaoka MP 500 has a lower compliance but I am not sure. You have any number of directions you can head in. I am not a big transformer fan. I do not like more contacts and interconnects in the way of the very low signal from the cartridge. I think if you want to go with a low output cartridge you should upgrade your phono stage. If you want to go high level you will benefit from a lighter arm. @rauliruegas seems to know more about your arm than I do and he might be able to add more advice. 

Mijo, Have you listened to both The Voice and a Sussuro, in your home system or anywhere? I would be curious about a comparison, because I may want to add to my collection of MI cartridges, and I don't own a Soundsmith.  If you think the Sussuro has nothing more to offer in terms of SQ except for a lower output V, that would be good to know.  Since it's the iron that moves, I would think that more or fewer coils doesn't make much difference in MI types.

Dear @mijostyn  : Yes, you are rigth but when you can't mount a second tonearm in the same TT then the arm pod is an alternative.

 

I can tell you that I had a long first hand experiences with external arm pods when I was using my Denon's in naked fashion and maybe I was not aware of a detectable kind of distortions with, but this is me.

 

Now, as we can always we have to take the orthodox road with TT/tonearm mount.

 

R.