Does your typical analog non-powered mixer boost the mic inputs to line level for all the signal processing ie. effects, eq, panning, or does it remain mic level?
I've never heard of a "non-powered mixer" that handles amplification from mic to line level. Hell, I haven't even really heard of many (if any) "non-powered" mixers to begin with. amplifiers need both a signal source, and a power supply.
Do you have a particular model your thinking of? Because this question honestly doesn't make much sense to me.