Dear Ctm: I wonder why do you want to be so " strict " on the subject, well not so strict because you know want to use a limited digital technology with a signal that comes with no RIAA eq.
+++++ " to achieve identical musical passages when played back though the system " +++++
You can have it directly running both cartridges the same LP track in real time.
There is other subject that we have to take in count: that many preamps change its characteristics ( frequency response/distortion/noise/etc ) at different listening levels and that ( too ) if the Phonolinepreamp does not comes in one chasis there will be another variables: connectors and interconnect cable.
Regards and enjoy the music.
Raul.
+++++ " to achieve identical musical passages when played back though the system " +++++
You can have it directly running both cartridges the same LP track in real time.
There is other subject that we have to take in count: that many preamps change its characteristics ( frequency response/distortion/noise/etc ) at different listening levels and that ( too ) if the Phonolinepreamp does not comes in one chasis there will be another variables: connectors and interconnect cable.
Regards and enjoy the music.
Raul.