Miyajima Lab Zero Specs?

I agree about the need to tame the hum. I have been using a Benedict Hothead mm with Bobs Devices SUT and getting good results, but I have recently bought a Pass Labs XP25 and was wondering about the best settings for the Zero. I will also try the SUT with the XP25.

Ideally the Zero needs a step-up. If hum is an issue then a mono button (or a double-y connector) cures completely. Seems to be less of an issue where a step-up transformer is used.

I have three Miyajima monos - Zero 0.7, Premium 1.0, and Kotetu 78 3.0. They are all slightly different but work superbly on the 6 ohm setting of my EAR Yoshino 912 preamp which I think equates roughly to a 1:20 step-up. In my view they are better suited to a step-up transformer - certainly it sounded better in a previous setup through a Hashimoto HM7 SUT (at the lower 1:15 ratio rather than 1:30) into my Aurorasound Vida phono stage than direct into the MC input which from memory is about 500 ohm.

I had not heard about using a double Y. I'm going to try it. I take it that the double Y is between the SUT and the pre-amp?

... or is the double-y between the turntable phono cables and the SUT?

I would try both but suspect that between phono cables and SUT is the most appropriate place.