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Does size really matter? :-

I've seen stylus size discussed in regards to 78s and mono records, but never as it pertains to our good old stereo LPs. I was recently looking at cartridge specs, and was astonished by the difference in the size of the styli. Let's take, for example, 3 cartridges I'm considering:

Sumiko Blackbird Elliptical 0.3 x 0.7 mm

Dynavector 17D2MKll Karat Square .06 x .06 mm

Zyx Bloom Line Contact 6 x 35 um

Converting the first two to um from mm, we get this:

Sumiko 300 x 700

Dynavector 60 x 60

Zyx 6 x 35

This indicates the Sumiko is 50x wider and 20x longer than the Zyx! The Dynavector is between them. Even allowing for the different stylus profiles, this seems like an enormous difference in stylus size. Am I missing something?

I've read in other threads that the Zyx owners talk about the Zyx getting deeper into the groove, retrieving more info and, more importantly, contacting a section of the groove that, in the case of used records, previous styli haven't touched. Considering the above figures, these statements now make much more sense.

My big question is, why don't more manufacturers use the smaller styli? Are there advantages to larger styli that I'm missing? It doesn't seem like cost should be a factor, as the Zyx above is a US$490 cartridge. Do the smaller styli wear quicker? Easier to break? Harder to align?

Just wanting to get A'goner's thoughts. If there's a previous thread, please point me to it - I did a search, but didn't come up with anything relevant. Thanks.

David
armstrod
armstrod OP
617 posts
 
Doug,

The pictures certainly dramatize the difference in styli - it's stunning. Are you sure all 4 were done at the same magnification? Based on the revised calculations, I wouldn't expect the visual differences to be so dramatic.

David
dougdeacon
3,338 posts
 
David,

I only know that all four photos were taken by a professional photographer and that his email said they were at 200x. He sent them to me as a single image specifically so I could appreciate the visual comparison.

The Denon, Shelter and ZYX are definitely at the same magnification. I've owned/used those cartridges and that's exactly how they look.

That Grado does look incredibly huge. FWIW, the photographer owned the Grado, demoed (and photographed) my Shelter 901, then bought the ZYX R100 Fuji on my recommendation. He said it outplayed the Grado by an enormous margin. He's still using it happily today.

Doug

P.S. As interesting as this topic may be, I agree with Raul. Don't buy a cartridge just by stylus size or profile. Compatibility with your phono stage and tonearm are primary, and compatibility with your musical and sonic goals is more important than any technical measurement, even for an accountant!
armstrod OP
617 posts
 
Doug, Raul,

I agree completely that many factors (not just one in isolation) need to be considered when choosing a cartridge, but how is stylus size and profile any more or less a technical measurement than cartridge mass, compliance, or output? All of these factors are fixed by the manufacturer, as opposed to the things we can control, like alignment, VTF, VTA, and loading.

It's pretty well accepted here that mass and compliance are really important to get a good match with your tonearm, and we have formulas to help us get in the right ballpark. Same thing with output and the amount of gain needed in our phono preamps. I just wonder why the effects of stylus size and profile haven't been quantified. Is it because it doesn't matter, or is it because we don't know how to measure it?
indigorose
13 posts
 
Doug - Thanks for posting those photos. I've never seen such a close up shot like that before. Very cool!

Colin
dougdeacon
3,338 posts
 
Armstrod,

What I was trying to say is that NO set of technical measurements, however complete, can identify the best cartridge for your system and your tastes. Specs can help you avoid serious mismatches. That's about all. If you expect any more than that you'll be disappointed.

No one has measured all the synergies that happen between components. Hearing them is still the only way to know them. Next best is the experience of others, though of course that's less reliable due to differing systems, differing ears and differing tastes.

Indigorose,
Glad you enjoyed those. I was as amazed as you when I first saw them.

Photo credit, as I mentioned above, goes to my friend (and occasional A'gon poster) Styx. You should see his wildlife photos. Amazing stuff, National Geographic quality at least.

Doug
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