Cartridge loading


Presently I am using a ZU/Denon DL103 mc cartridge with ZU Audio's highest tolerances.  I had this cartridge mounted on my VPI Prime and after going through all the various loading combinations, I settled on 200 ohms.  I was always satisfied with my choice of setting.  I no longer have the Prime and now use the Technics SL1200G turntable.  After having the same cartridge mounted and aligned by the dealer, I inserted it into my system and enjoyed the sound immensely, never touching the 200 ohm setting.

Yesterday I was listening to vinyl most of the day and for some reason I found the sound to be better than ever, mostly in the treble area.  The highs had shimmer when needed and I had played the same records many times before on the Prime and they never sounded as good as they did yesterday.  Just for the heck of it, I checked the cartridge loading and found it was now set at 1000 ohms.  As I said, when I put the Technics into the system, I never bothered changing the loading which was at 200 ohms as it was the same cartridge, just a different turntable.

I believe I know what happened, when I last used the tone controls on my McIntosh preamp, (you have to shuffle through a menu) I must have inadvertently put the cartridge loading at 1000 ohms.  It truly sounds fantastic, better than I ever thought possible.  The Bass is still very deep and taut, midrange is the same but the treble, oh my, so much better.  Now the million dollar question is why should it now sound better at 1000 ohms, when it sounded great before at 200 ohms?  Can the tonearm on the Technics have an effect on cartridge loading?  I always thought it was all dependent on the preamp, amp and speakers.  What am I missing here?  I am very curious to know.  The specs for my cartridge say greater than 50 ohms for loading.

Thanks
128x128stereo5

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Cartridge loading discussions were endless, are endless and will be endless...
To make it short, to dampen a cartridge means, you reduce their headroom, 
47kΩ is 'open', you can hear the cart purest, the way it was made, when 
your System is not up to the task to handle that (and most can't), you can 
dampen it down (some say it has to be done based on high frequency 
distortions but that is wrong). With one of the better Phono Stages you can hear 
it easily when you step down from 47kΩ it always becomes more slow 
and dull (but honestly a lot of Systems need that, the wonder word is: 
Compensation, with Cables you can do the same)
To design a Phonostage which is silent, not sensitive to hum or other 
influences, probably with higher gain (62dB and more) AND finally has to sound 
like music and not dead and lifeless (most do) ---> this is VERY difficult to do , 
the Designer really needs knowledge about that chapter. In the last 15 years I 
only heard 3 Phonostages which were able to solve that
- Klyne Phono 7
- Atma-Sphere
- J. Curl Vendetta
All the other countless designers will find endless reasons why their units run 
best with 100Ω or 125Ω or 165,37Ω or 358.5Ω -:) but at 
the end of the day, they can't do it better. It is the way it is.
Marketing can replace knowledge [and does of course and when it is repeated 
countless times, it becomes ---> A Fact :-)]
Years ago a lot of cartridge manufacturers wrote in their datas: recommended 
loading 47kOhm (Benz for example)....with the result, that the customers 
tortured their dealers that their Phonostages were not able to run with 
47kΩ (or they sounded simply awful with this setting, Levinson, XONO and 
so on), and they didn't buy the cartridge. 
No deal is the worst deal for a 'Dealer'
Now we have in the manuals: Recommended loading 100Ω -47kΩ 
The problem is solved now
That's High End :-)