Good question. The Phono 70 has 70 db of gain and it is my understanding that it is not a good match for anything >.5mV output. The designer of the unit stated it was specifically designed for LOMCs, primarily in the .2 mV to .5 mV range.
With my prior phono preamp I had to crank the volume up fairly high to achieve a reasonable volume level with my .2mV Ortofon cartridge. Not so much anymore.