Ref phono does quite well with .4 mv carts including my Kuzma CAR-40 and Koetsu Urishi Black the overall gain structure of the system is and should be
its all ARC Ref series out to high eighties db Tidal Piano. I’ve run carts w right at .2 and that is sketchy but I’ve got a couple of nice SUT.
congrats to OP the 6se is imo a superb line stage. Have fun !!!!

