gain setting for mm cartridge

Hi, wondering what the gain setting should be for a 4mv mm cartridge? thanks
It really also depends on the gain of the line stage of the preamp, but 48db of phono gain with a 4mv output cartridge will yield right at a 1v output, (1005mv).
There's a great explanation of phono gain at KAB's website. It includes a handy calculator to find the optimal gain for any cartridge.