I have used the Prologue Premium Integrated with Magnepan 1.7's since March...I believe they are 86db efficency and run about 6 ohms. I detect no real power lack comparing to how I used the modified Hafler DH -200 I had before. What I have discovered is that the pre section rolls off the lowest bass compared to a CJ PV10A pre feed into the home theater inputs. I also use the 4 ohm speaker outputs with the Magnepans for better definition. And in all fairness I am not a heavy metal fan... my db level stays between 70 to 95 db in a 20 x 24 room. No doubt better gear in the $2K + source range would stress the system wattage more for dynamics and lower bass but at that point it wouldn't make sense to use a $2K integrated when your integrated doesn't match the source quality. Since the Focal speakers are 91db efficiency your wattage needs are less than mine.
Note that Prima Luna is having a sales on the Dialogue Premium Integrated... I'd strongly recommend stepping up to that for the better transformers and hopefully a more detailed pre section than the Prologue Premium Integrated.
Note that Prima Luna is having a sales on the Dialogue Premium Integrated... I'd strongly recommend stepping up to that for the better transformers and hopefully a more detailed pre section than the Prologue Premium Integrated.