Boron Rod is at the top of the chart.
I have a few aluminum, straight and tapered, several boron rod cantilevers (my preference buying current production).
one vintage sapphire tube (Sumiko Talisman S), which I ASSUME might be above Boron Rod, as Sapphire Rod is just slightly below Boron Rod.
and this MM AT160ml was to get back to the lightest/stiffest: beryllium which I long remember from the V15Vxmr OEM stylus I loved/broke many years ago. I was still raising 2 boys at home in those years, not listening live much.
This AT160ml’s difference/preference is readily apparent on every/anything I play which surprised me, as the subtle difference between the boron rod and sapphire tube require concentration. And we expect MC to beat MM but "what you read in the bible ain’t necessarily so".
ronco’s "Might as well be in the club with them" says it best. It’s not just the best bass I ever heard (my primary remembrance), it’s the best ’every note’ I now realize. In addition to single concerts by name artists, twice a week for around 25 years, Age 45-70, I listened to live music, mostly Blues and Jazz in small clubs. It’s like that, even when I go to the kitchen for something, it sounds like I’m in a side room of a club, about to walk back in.
Of course, the source must have been done right to capture/create the ’involvement’, my word for what makes the difference, i.e. I find tubes more involving than SS..
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Boron:
my first MC choice after advice here was AT33PTG/II MicroLinear on Boron Rod.
https://www.audio-technica.com/en-eu/at33ptg-ii
Wore it out, got new one 1/2 price AT’s trade-in policy
Using Jico SAS tip on Boron in my Shure MM V15Vxmr body, with optional non-damped brush up
bought broken AT33PTG/II Mono, Yahoo Auction, had Steve at VAS put his advanced stylus tip he calls ’P’ on Boron Rod to have Mono Cartridge with advanced tip on it.
bought broken Shure MX97e, with OEM damped brush, had Steve at VAS put his advanced stylus tip he calls ’P’ on Boron Rod to have Stereo Cartridge with advanced tip and damped brush on it. It fits both MX97e and V15Vxmr bodies.
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I’m gonna stay on the prowl, when I remember, for some other vintage survivors.
It was quite interesting to read that Sapphire and Ruby are essentially the same, just color difference when it comes to light/stiff.