I always prefer to check the MC portion's signal boost (x factor), that is relative to the resultant impedance 'shown' to the MM stage.
that AT cartridge is 0.2mv signal strength; 12 ohm coil.
guidance for 'resultant impedance shown to MM stage' is coil impedance x 10, in AT case: 120 ohms.
x factor of 20 gives you a 4.0mv signal, very nice.
x factor 20 squared is 400. 47,000 divided by 400 is 118 ohms, nearly spot on to the guidance of 120 ohms.
then the MM stage deals with a 4.0mv signal at 120 ohms.
I don't know how unified phono stages to line level work, just saying,
x factor 20 is +26db, then MM boost of ____ db = total ____db
??