Phono cartridges put out voltage, and not much of that, but even less current. Because of the lack of current most of them sound more powerful and dynamic with a very high resistance, typically 47k Ohms. But this can result in something called ringing, an emphasis or hardness in the top end. A main reason MC are often regarded as having an exaggerated top end.
The solution is to load them down with loads that can go down into the hundreds or even tens of ohms. This greatly rounds out and warms up the sound. But because of low cartridge current output it can also at some point start to "run out of gas" resulting in decreased dynamics, detail and vitality.
Where exactly this point comes is entirely subjective. You can only decide for yourself. We are not talking minor hard to hear differences here either. One will stand out to you as right, or at any rate much better than all the others. Just try some different values. You will see.
The solution is to load them down with loads that can go down into the hundreds or even tens of ohms. This greatly rounds out and warms up the sound. But because of low cartridge current output it can also at some point start to "run out of gas" resulting in decreased dynamics, detail and vitality.
Where exactly this point comes is entirely subjective. You can only decide for yourself. We are not talking minor hard to hear differences here either. One will stand out to you as right, or at any rate much better than all the others. Just try some different values. You will see.