The internal impedance of the Shelter 901 is 20 ohms and the rule of thumb I use is to start with 10 times the internal impedance, and adjust from there. I am using my 901 at about 180 ohms and am happy with it. The specs say 100 ohms but I found that it stifled the high frequencies a bit. When you go higher, it opens up the high end, but with some bright cartridges like the Denon 103R, it gets too bright. When you go lower, it deadens the high end and sounds like it is choking the highs. Some call it a muddy and flat sound. I personally haven't found a problem with going with a higher impedance on the Shelter 901, so 470 would probably sound fine. It is always better to go higher than lower.
Shelter 901: Optimal Impedance
Hello,
I'm a neophyte with MC cartridges. I've recently acquired a Shelter 901 MC cartridge and I'm a little confused about the correct impedance to use. The manual says 100 ohms, but vinylengine.com states that user reports suggested 470 ohms. Perhaps this is a typo and they mean 47K ohms?
Might someone be able to advise me.
Thanks,
Mike
I'm a neophyte with MC cartridges. I've recently acquired a Shelter 901 MC cartridge and I'm a little confused about the correct impedance to use. The manual says 100 ohms, but vinylengine.com states that user reports suggested 470 ohms. Perhaps this is a typo and they mean 47K ohms?
Might someone be able to advise me.
Thanks,
Mike