I was in a "high end emporium" where we were enjoying the most glorious music on ARC electronics and top of the line Thiel speakers. That was the most fantastic sound stage I have ever seen. The illusion was so complete, that I felt like I could reach out and touch the performers, and the instruments occupied stationary positions in space.
Someone came in and wanted to audition a Rotel amp. Once this "mid fi" amp was inserted, the illusion fell completely apart; no more 3D sound stage. Remember, top of the line Thiel and ARC pre were still in the chain. What do you conclude from that?