No need to apologize -- as the saying goes "the only dumb question is the one not asked."
Phono stages are typically designed to work into line-level inputs of line stage preamps. Occasionally situations will crop up where mm cartridges have greater than average output and all of the electronic components have greater than average gains or sensitivities, resulting in mismatch problems, but those situations are unusual.
Your Bryston amp does not appear to be unduly sensitive, and in fact gives you some flexibility by providing sensitivity that is selectable between two settings. I think it's very unlikely that you'll have a problem, but for added confirmation you might want to post back indicating the model of your preamp and cartridge, and your candidate phono stage(s) when you've selected them.
Regards,
-- Al