Recently bought the Pass X150.8 to pair with my SF Oly3's. Pre is the tubed dual mono First Sound soon to be PD 4.0. Dual power supplies, dual mono schematic. With one power supply the tube pre in this system (FS PD 3) in addition to the Cary PH 302 tubed phono pre with good albums is startlingly good. I do mean good albums like the Verves from the 50's and 60's. Piano, sax, and jazz guitar simply erupt from the space around the speakers. Scary good. With two power supplies in the First Sound I expect the system to sound even more incredible. Also having an external power supply added to the Cary phono section. Flimsy albums from the 70's and 80's tend sound like the crap
they are. Unfortunately the limiting factor is always the source. Can't make ice cream from feces. The Pass X150.8 was a game changer in my system. Nottingham Spacedeck/arm Ortofon Cadenza Bronze.