In reality you should trace from cartridge output down to your speakers and even room.
Average power amplifier has 1V+- sencitivity for the full rated power. Having .5mV and driving it with 56dB will give you on output approximately 300mV. That is the minimal sencitivity should take place in your preamplifier. To have a minimal sacrifice to the dynamics you need to throw into the input of your power amplifier enough input to drive your speakers that are also rated db/W/m...
Average power amplifier has 1V+- sencitivity for the full rated power. Having .5mV and driving it with 56dB will give you on output approximately 300mV. That is the minimal sencitivity should take place in your preamplifier. To have a minimal sacrifice to the dynamics you need to throw into the input of your power amplifier enough input to drive your speakers that are also rated db/W/m...