I use a .3mv cartridge with 60db of gain and it works well. I would think it will work great also. I will say that the REGA is not known for having a lot of settings which is why I bought a more versatile unit for myself. The Lyra should work very well with it I dont think you will have to crank the knob for the volume as much with 64db. I would not worry.
Matt M
Matt M