As chakster said above, it's easy if you are using an MM cartridge. Not that all phono stages sound the same, but most (but not all) high output cartridges will work fine with standard MM settings.
If you are going to use an low output MC cartridge you have more options: integrated low output stage in your phono preamp, head amp or SUT (step up transformer). Optimal loading may be significantly different from cartridge to cartridge so I suggest that you try to match your cartridge to your phono gain stage carefully.
If you are going to use an low output MC cartridge you have more options: integrated low output stage in your phono preamp, head amp or SUT (step up transformer). Optimal loading may be significantly different from cartridge to cartridge so I suggest that you try to match your cartridge to your phono gain stage carefully.