What's up with picofarads?

The SHO is a moving coil, and isn't sensitive to capacitance like a MM cartridge is. MC's are more sensitive to impedance. As long as the input is set at the right impedance, forget the pF settings!

Many MC's are affected by the capacitance that they load into. The fact that your cartridge doesn't seem to be "bothered" by any of the settings tells me that it is probably less sensitive to capacive loading. You might want to experiment with the resistance of the load though as this surely WILL alter frequency response. Sean
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Sean makes ther point that capacitance CAN effect a MC, it's just that most of them don't seem to be as effected by these small changes in value as a MM is. If you don't hear the difference don't sweat it.

The original ARC SP 9 came with a 560pF cap in the loading section to prevent instability with some high output moving coils. My Shinnon Red sounded better without it and didn't cause any ossilation.

The SHO is designed to sound good into a MM phono set up for a load of 47K ohms if I remember right. It seems to me like you are pretty good to go with the Pass and this cartridge. I always wanted to try one, how do you like the sound of the SHO so far? I was a big far of the Virtuoso Boron which was the previous Sumiko offering. Anyone out there know anything about the sound of the new Sumiko Blackbird? That might be my next cartridge judging from what I have been able to dig up so far.