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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
opalchip
355 posts
 
I have a call into Sumiko to verify but - I'd be willing to bet (you name the amount) that someone read "mil" and figured that's the same as "mm" when setting up the website.

Since one mil is equal to about .025 mm. - Considering that the groove width of a modern stereo lp is nominally between .7 mils (as measured halfway down the groove wall), a .3 MILLIMETER stylus would be roughly 17 times the width of the groove itself.
opalchip
355 posts
 
CONFIRMED by Sumiko - the measurement is .3 x .7 MILS (thousandths of an inch) not mm. They will be changing their info.
armstrod OP
610 posts
 
Dougdeacon,

Maybe I lack imagination, but I'm having a hard time picturing the shape of the Zyx stylus you describe. Any chance you could upload the pictures your friend took of the Zyx and the others? It would be educational for all of us.

As to other manufacturers, you're correct that Lyra and VdH use styli similar in size to the Zyx, with the Lyra Dorian the least expensive at $750 USD. The Dynavectors claim a line contact stylus, but their quoted size is much larger that the Zyx, Lyra and VdH.

I have a feeling there's a Zyx Bloom in my future...
armstrod OP
610 posts
 
Well, Opalchip,

That certainly puts a different cast on things, doesn't it? So now the dimensions of the Sumiko, converted to um, are 7.5 x 17.5. That's quite a difference! It was the huge discrepancy that prompted my original question. So the Sumiko, at least, is a similar size to the Zyx.

I also checked the Denon 103, and it's listed on their Japanese Web site as 16.5 um round, also within the same size range. The Shelter 901 is specced at .3 x .7 MIL (they must know the difference!) so that makes it the same size as the Sumiko.

So now I'm starting to wonder. Dougdeacon saw clear differences, but could that be attributable more to the different profiles of the styli rather than their absolute size? Most here agree that tiny differences in any aspect of a vinyl setup (VTA, VTF, alignment method, antiskate, etc.) can make a big difference in sonics, and now it looks like styli are another area where the differences are small.

Sigh...vinyl just resists all our attempts to simplify, doesn't it?

:-)
nightdoggy
32 posts
 
Bang & Olufsen and Ortofon publish(ed) ETM (efective tip mass) specs for their cartridges. I've seen figures as low as 10 mg and as high as 80 mg. This factors in the total moving mass of the cantilever assembly. It is a telling spec of much "effort" would be required to travel or plow through the groove. I suspect it is a factor in record wear also.
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