What are you tracking the Supex at and what arm are you using? What is its mass? I use to be a Supex dealer in the 70s and 80s.
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Hi Greg, my other carts are an ortofon MC3000, Garrott P89, Decca SC4E. I've had an AT 150MLX fwiw, among (many ;-) ) other cartridges.
It's been a really long time since I heard the AT and to be fair, for the same reason/biases I don't own a Koetsu, it wouldn't really be appropriate to compare the Supex against specifically my Decca and P89.
I do however really like my Supex. It's a very relaxed sound, great midrange. It doesn't rock imho. Mine tracks superbly fwiw.
Check out cartridgedb.com for your setting if you haven't already.
If you have the spare funds I really encourage you to get your one rebuilt unless you listen to mostly rock.
Hope that helps and all imho ;-)
In HIFI Choice issue 28 from 1982 the Supex 900e Super required 2.6 grams to track the Supertrack cut from the Shure test record. They recommended an arm mass of 12-20 grams. I would track at 2 grams at least for ordinary listening and add mass to the arm if it is below 12. The Supex came with a lead weight in the shape of the cartridge to add mass to arms. I would not worry about tracking weight, it has no effect on record wear if the diamond is well polished, see Decca's tests of 30 years ago. There are several ways of adding mass, Vinyl Engine or Audio Asylum will have good advice on which works well.
I'm pushing 2.25 grams and it tracks through 6 & 7 fine but not 8. The warmth and smoothness of this cartridge is very seductive, not muddy. Very balanced sounding. You have to load it @ 40ohms at least with 15 to 20ohms being best. SUT loading. Transparency is not it's thing but again oh so seductive. It pushed my Dyna DV20XL out the door.