Orpheus10,
Marakanetz, mid-fi and 3D soundstage don't even go in the same sentence.
I do have my personal doubts on that statement.
I have 1996 Aerial 10t speakers driven with mid-fi Class T Sunfire SRA(250wpc/8Ohms continuous power) and can't stop enjoying them with all beauties of 3D slam, details.
I also know that I can greatly benefit if I upgrade the amp, but not ready to switch from my current $700 amp to $4,000 McIntosh(MC302...MC452). Going Pass, Krell, Classe or Plinius streets is even more pricey than McIntosh street for required power. Moreover for some reason despite prehistorical circuit designs even on modern units Macs to me sounded the best over much higher priced units.