Ayre Phono P5xe settings low / Med / High ?

I am using a Ortofon 2M black and according to the manual, I need to keep the internal settings on the phono pre as low since the 2M is 5mv in gain.

Its is said that keeping the gain in medium level keeps things smoother in performance? Is this correct and does anyone have an inside for this, thanks

I will have to try it when I get back but curious on feedbacks.

Rapogee