Who needs a Diamond Cantilever...? 💍


So suddenly, there seems to be a trend for Uber-LOMC cartridges released with Diamond Cantilevers...😱
As if the High-End MC cartridges were not already overpriced....?!
Orofon have released the MC-ANNA-DIAMOND after previously releasing the Limited Edition MC-CENTURY...also with Diamond Cantilever.
Then there’s the KOETSU BLOODSTONE PLATINUM and DYNAVECTOR KARAT 17D2 and ZYX ULTIMATE DIAMOND and probably several more.

But way back in 1980....Sony released a Diamond-Cantilevered version of its fine XL-88 LOMC Cartridge.
Imaginatively....they named this model the XL-88D and, because it was the most expensive phono cartridge in the world (costing 7500DM which was more expensive than a Volkswagen at the time)....Sony, cleverly disguised this rare beast to look EXACTLY like its ’cheap’ brother with its complex hybrid cantilever of "special light metal held by a carbon-fibre pipe both being held again by a rigid aluminium pipe".
The DIAMOND CANTILEVER on the 88D however......was a thing of BEAUTY and technological achievement, being formed from ONE PIECE OF DIAMOND including the stylus 🤯🙏🏽

I’ve owned the XL-88 for many years and recently discovered that it was my best (and favourite) cartridge when mounted in the heavy Fidelity Research S-3 Headshell on the SAEC WE-8000/ST 12" Tonearm around my VICTOR TT-101 TURNTABLE.
Without knowing this in advance.....I would not have been prepared to bid the extraordinary prices (at a Japanese Auction Site) that these rare cartridges keep commanding.
To find one in such STUNNING CONDITION with virtually no visible wear was beyond my expectations 😃

So how does it sound.....?
Is there a difference to the standard XL-88?
Is the Diamond Cantilever worth the huge price differential?
Is the Pope a Catholic....?

This cartridge simply ’blows my mind’...which is hard to do when I’ve had over 80 cartridges on 10 different arms mounted on two different turntables 🤯
As Syntax said on another Thread:-
When you have 2 identical carts, one regular cantilever and the other one with diamond cantilever (Koetsu Stones for example), the one with diamond cantilever shows more details, is a bit sharper in focus and the soundstage is a bit deeper and wider. They can sound a bit more detailed overall with improved dynamics
I’ll leave it at that for the time being. I will soon upload to YouTube, the sound comparisons between the two Sony versions on my HEAR MY CARTRIDGES THREAD.

But now I’ve bought myself a nightmarish scenario.......
There is no replacement stylus for this cartridge!
There is no replacement cantilever for this cartridge!
Each time I play records with it, I am ’killing’ it a bit more 🥴😥
If I knew how long I had left to live......I could program my ’listening sessions’ 🤪
But failing this.....I can’t help but feel slightly uncomfortable listening to this amazing machine.
128x128halcro
No-one disputes that overall performance is the sum of parts. That’s a straw-man argument. And 'wobbly' is obviously relative.

However, with plenty of evidence for the proposition that more rigidity is better (see, for example SS’s recommendation of the ruby cantilever, the common use of boron in better cartridges), and the complete absence of any evidence to the contrary, it seems reasonable to try to explain WHY a Koetsu D/C sounds so very good.

I suggest that a good place to look is the rigidity of the diamond/diamond junction. The measure of that is Young’s modulus.

Young’s modulus, according to the "Engineer’s Toolbox", is as follows:
Al 69 GPa
Boron 360-470 (from Azom)
Corundum (ruby, sapphire) 435
C nanotube 1000
Diamond 1220
@rauliruegas, I have a wonderful sounding phono stage, an ARC PH3 SE with super low noise tubes installed. It has two Sowter 1990 transformers installed which I can adjust for pretty much any moving coil cartridge. The Sowters have their own inputs and inside I installed another terminal strip which forms a bridge to the input stage. For high output cartridge use I just disconnect the terminal strip. 
I know you prefer SS phono stages but this is the most solid state sounding tube phono stage I have heard. It does have a FET input stage and it uses 6922 tubes which are no where near as colored as 12AX7s.

I am going to add either a current mode phono stage or a strain gauge
set up eventually. What are your feelings on this subject?
@terry9  : Again, assuming you are rigth ( no evidence about in this specific application. Facts. ) then all cartridge designers, not only JC, are wrong .

So, why don't try to prove them that they are wrong and must leave to use boron as material in their cantilever cartridge.

R.
mijostyn, you can try current mode but if your choice is a strain gauge one remember that this is a dedicated item for that cartridge.

Btw, years ago were a discussion thread talking about the SS strain gauge where , in those times, the unit does not conforms with the RIAA standard and the designer asaid that its unit in " natural " way conforms ( more or less. ) with the RIAA. There was proved that was not exactly true.

In that time the manufacturer posted on the SG : "" it was +/- 1dB from 50 Hz to 12K in "" ( a 2db swing. ) way out of RIAA standard. I don’t know it performs today in that regards.

I don’t know, today, for sure about.

R.
@rauliruegas 

They are not wrong, Raul. Boron and ruby are cheaper. Diamond is more expensive and harder to work.