If your phono preamp is delivering enough gain for a standard system preamp line-in voltage (and not just enough to bring the voltage from MC to MM input) it ought to work.
phono preamp to power amp
It is probably a dumb question, but I am ignorant, why should I pretend. :)
Long story short, I gave away my integrated and bought a power amp. I am planning to buy a second one and use them as monos. For now (and then) can I plug my phono preamp to the power amp? Or I need a preamp? I googled and the answer was mostly "it depends"