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Supex 900 question

Hi,
I recently came into a Supex 900 Super. Compared to an AT150MLX I have, it sounds warm, smooth, full bodied. The AT is much more three dimensional, airy and transparent.

When I run them both on the Hi-Fi News Test Record, the AT tracks like a champ. No problem with tracks 6-8. The Supex on the other hand only tracks 6 and buzzes substantially on 7 and 8. Both were set up with a Mint LP protractor. The Supex though was much more difficult to align because the cantilever is more pushed back and shorter. I think I got it right, maybe not quite as exact, but certainly better than I could with a worse protractor.

Are these tracking problems symptoms that the Supex may have suspension issues and need to be rebuilt? Or are they traditionally poor trackers?

I would love to get that smooth sound with a little more of the transparency of the AT.

Thanks,
Greg
gregmeier
bcoasis
11 posts
 
Hi Greg, I have a 909 mk2 which was rebuilt by the Garrotts to great effect. It tracks very well fwiw. To me it's kind of a 'poor man's' Koetsu if you can excuse the expression ;-) I use mine on either an Ikeda IT-345 or an SME 1012R.
gregmeier OP
3 posts
 
Hi Stanwal, I have a KAB modified Technics SL12xx with the standard tonearm and fluid damper. I am tracking at 1.8. Do you think my problems could be a set up issue?
gregmeier OP
3 posts
 
Hi Bcoasis, Thanks for your response. I am considering sending the cartridge for a rebuild. What other cartridges do you use and how does the Supex compare?
bcoasis
11 posts
 
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 ;-)
stanwal's avatar
stanwal
3,147 posts
 
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.
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