Well SME have a history of producing Knife Edge Bearing Designs, they probably sold in 10’s of 1000’s and guess what, all were most likely really ’ENJOYED’ by their owners, and I will even go out on a limb and suggest a large selection of individuals still ’ENJOY’ them today as being equipment used for sound reproduction.
OK
Well due that your analog knowledge level is so low for you " sound smart " but it's the other way around because no one audiophile with good knowledge level will choose SAEC tonearm with that " terrible " double knife bearing design, other than unipivots the worst tonearm bearing to mount any cartridge. I owned the 8000, 506 and 407 models that were the top in the SAEC line.
Well I choose it in ~84, as that was when the TT was bought and set up. So it is not like I found one on the side of the road, and thought “that’ll do”.
It was more at the time the dealer said, “that’ll do”.
If I knew what to listen for, and when the knife-edge bearing would be making chattering noises, then maybe I would be able to hear the flaw. But it seems to sound pretty good. I do have a test record coming in the mail, so I’ll see what it reveals. That gives me some time, as the whole bevy of arms is a lot to go through.
Other than effective mass, and what cartridges can work… there is also what fits on the TT… and from that list is I suppose tracking error and maybe rumble/chatter as objective things.
But what subjective things should be evident in a cheap old SAEC arm (like mine) that I should be listening for?