Use an outboard pre-pre. I am using the (lovely) MC/MM phono section of my "old" preamp (16 years) at its lowest gain. This yields 0.7 Volts on the "tape out". To compensate I programmed +9 dB gain on the connected ML380S input. On the ML28 you'll have to turn up the volume for phono manually. Yet the required gain will be well within its capabilities to fully drive any power amp.
