@lewm thanks for checking in again. This whole phase issue is confusing to me. You had mentioned that it didn't make any audible difference. I have to be honest that I have not had any experience with hearing it in my system while out of phase.. But I'm still shaking my head as to why Sonic Frontiers requires inverting it for mc carts, which is the preamp prior to my new one. Will have to say though: the SFP1 modified at parts conexion sounds fabulous. The only problem is if you want to change carts you have to take off the hood and do calisthenics to set loading values. Modified vintage is great, but give me dials on the front panel, please.😊
Best regards