I'm running Hifiman HE400i and I use low gain with Modi2U and high gain with my vinyl coming out of an AVR with a cheapy phono pre in it. need to get a second Mani and a sys for the office vinyl/digital setup. I think I only need high gain with vinyl due to the relative crappiness of the phono pre in the AVR. probably only has ca 36db gain and my cart would work better with a higher gain setting. more like 42
I have a mani and sys that I would be willing to let go of if you are interested. The have maybe 15 minutes of play time on them. Let me know.