Audio Technica AT-OC9 evolution

the thin end of the wedge
scho2684
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Audio Technica AT-OC9 evolution

Post by scho2684 » 23 May 2018 12:47

I was in a discussion the other day on a FB group about the weird situation that the ML/II is still available next to the /III and thus a direct in house competitor in my view...

I had already made a overview of the differences once, here's a new overview with more info in it.
Two items remain open: the year the initial OC9 discontinued and the Yoke material for the ML/II
Be my guest to complete it or even add additional information that could be of some value in this overview...
AT-OC9 Evolution Rev1.jpg
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rewfew
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Re: Audio Technica AT-OC9 evolution

Post by rewfew » 23 May 2018 18:50

It seems also to be running close in price to the newer model. I bought the II when the new model came on the market and got it for a real good price, (about half of current). It's a great cartridge, how much better could the newer III be?

scho2684
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Re: Audio Technica AT-OC9 evolution

Post by scho2684 » 23 May 2018 18:57

Same story here...
Here in The Netherlands they are only 60 Euro apart...

Not sure but if you are a paper spec freak it seems to me that the ML/II is the one to go for. But like I already said: I find it weird that they keep the ML/II and /III next to each other, unless its only because of the compliance but that was never really a issue with the OC9, it fits wonderful in many arms...

billshurv
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Re: Audio Technica AT-OC9 evolution

Post by billshurv » 23 May 2018 19:15

One of those compliance figures can't be right...

scho2684
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Re: Audio Technica AT-OC9 evolution

Post by scho2684 » 23 May 2018 19:50

Well, I can't test it but this is what AT gives in their specs...

rewfew
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Re: Audio Technica AT-OC9 evolution

Post by rewfew » 23 May 2018 21:27

I'm just glad to have the II. And for a bargain price. What ever differences in performance between the newer models and the II, I don't feel cheated. Especially the cost of the titanium model. Looks like a give and take between some of their specifications. Which doesn't bother me a smidge.

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Re: Audio Technica AT-OC9 evolution

Post by billshurv » 23 May 2018 23:24

The reason I have an issue with it is that both the II and III have the same static compliance. However the III has a higher recommended VTF. Now 100Hz compliance is actually a measure of the minimum tracking force required to track a 100Hz test disk track and the higher the compliance, the lower the minimum VTF. Make a cartridge with double the compliance but a higher VTF, whilst not impossible is unheard of.

scho2684
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Re: Audio Technica AT-OC9 evolution

Post by scho2684 » 24 May 2018 04:56

I agree, its a weird set of numbers the way its presented (in compare to each other)
I have a person claiming that the /III is actually not made in Japan, he's getting back to me if he finds out where the /III is made but I haven't found proof yet that its made somewhere else...

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Re: Audio Technica AT-OC9 evolution

Post by DeepEnd » 24 May 2018 07:55

I was wondering if AT have two methods of attachment or materials used to retain the stylus assembly that contribute to the sound (and compliance) and therefore used to target different “consumers” and why they keep the two versions going.

If you look at the ART7 and ART9, they have a similar split both with similar prices, the same stylus, the same recommended tracking force and same static compliance yet have similar variations on compliance like the OC9’s with one having a dynamic compliance of 10 and the other 18. I wouldn’t have thought a change between magnetic or non magnetic materials for the coil pole pieces would explain the difference in compliance (but does the output levels).

Blooming complicated this cartridge design and buying business!!

billshurv
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Re: Audio Technica AT-OC9 evolution

Post by billshurv » 24 May 2018 09:38

It's possible. Certainly there are small design changes between II and III (coil inverted). It's also possible that one of the main reasons for the change being Namiki stopping micro ridge stylus on gold plated cantilever and they are using up stock. We will never know.

But 100Hz compliance of 18 would be shure V15 tracking weight territory normally. Which is why 100Hz compliance figures are not much use to us.

bimasta123
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Re: Audio Technica AT-OC9 evolution

Post by bimasta123 » 31 May 2018 09:37

Odd that a thread titled "Audio Technica AT-OC9 evolution" omits the first one. I bought the OC-9 (with no Roman numerals) way back when it was the "biggest bargain in Audio history! Worth far, far more than its humble price!" That was back in the 1980s. Never even opened the wrapper, just saved it for my golden years, figuring cartridges would either disappear altogether, or reach stratospheric prices.

I finally opened it, but haven't played it. What can I expect? You all seem to like its successors. Don't bother worrying the suspension may be shot, it's fine. Did any of you own it, and remember it?

I know I can just play it and form my own opinion — but after waiting so long, I'm trying to build up some dramatic anticipation.... Thanks!

scho2684
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Re: Audio Technica AT-OC9 evolution

Post by scho2684 » 31 May 2018 11:25

bimasta123 wrote:Odd that a thread titled "Audio Technica AT-OC9 evolution" omits the first one.
...
Did any of you own it, and remember it?
What you mean with "omit" its the first one in the overview...
I did own the first one, indeed when it was the greatest bargain one could think of MC wise...
The successor ML/II is the better one though (I think)...

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Re: Audio Technica AT-OC9 evolution

Post by bimasta123 » 01 Jun 2018 03:03

Yes, it does appear in the overview, Scho; and thanks, a great comparison of the specs. But it seems all the comments refer to the successor models... I was hoping for some insights into original.

scho2684
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Re: Audio Technica AT-OC9 evolution

Post by scho2684 » 01 Jun 2018 05:57

Ah okay, misunderstood...
I had the first one in a SME III (you would think that's a mismatch, not) on a Thorens, it sounded absolutely great but I also have to say that between my original and the ML/II there was too much time to really make a comparison.

None the less I would think that the later MicroLine stylus was a much more capable detail retriever than the elliptical stylus of the MK1 plus the fact that the change in magnets from what I have read on www in that case was a progress, much in contradiction to the /III for both changes...

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Re: Audio Technica AT-OC9 evolution

Post by billshurv » 01 Jun 2018 12:04

Actually I would say the 3009 S3 would be a perfect home for the OC9.

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