Are all Phono amps have the same schematics just like all power amps? I am looking intp PS Audio phono as well as Phonomena II and it seems the only difference is number of adjustments between these two and my basic Rotel Phono. I need to sort this dillema. No, I have a friend who builds quality phono stages and there are many different circuit variations. Also, look into the Jolida JD-9A phono stage. I have one and it is quite good for the money.