Seems to me, your question is not "stupid", but there are some factors to consider.
In concept, you just want a buffer amplifier with about 20 dB of gain (because that is the average difference bewteen MM outputs and MC outputs, a factor of ten) to put between the MC cartrigde and your MM phono input.
In theory, a line stage amp will give you this, depending on the design, and you would probably need to use its power amp outputs, because line level outputs like TAPE out will not have enough gain.
But, in reality:
(1) You need a second linestage amp to go from your phono preamp to the power amplifiers, unless its already got a gain control built in;
(2) You cannot use the same linestage amp for both functions as explained above;
(3) You will have noise problems because the noise floor on most linestage amplifiers is much higher that what is desirable for MC inputs;
(4) You cannot load the MC cartridge correctly if it is a cartrigde that requires a low input impedance such as 100 ohms. That being said, there are some high output MCs that can be loaded at 47K.
So if you have two linestage amps of execptional low noise performance, its possible, depending on the cartridge. But probably not practical.
In concept, you just want a buffer amplifier with about 20 dB of gain (because that is the average difference bewteen MM outputs and MC outputs, a factor of ten) to put between the MC cartrigde and your MM phono input.
In theory, a line stage amp will give you this, depending on the design, and you would probably need to use its power amp outputs, because line level outputs like TAPE out will not have enough gain.
But, in reality:
(1) You need a second linestage amp to go from your phono preamp to the power amplifiers, unless its already got a gain control built in;
(2) You cannot use the same linestage amp for both functions as explained above;
(3) You will have noise problems because the noise floor on most linestage amplifiers is much higher that what is desirable for MC inputs;
(4) You cannot load the MC cartridge correctly if it is a cartrigde that requires a low input impedance such as 100 ohms. That being said, there are some high output MCs that can be loaded at 47K.
So if you have two linestage amps of execptional low noise performance, its possible, depending on the cartridge. But probably not practical.