So, if I compare, say a Pass Labs XA 30.8 (30W class A) vs a Pass Labs X260.8 (1st 34W are class A assuming 8 ohm loads) at regular listening levels on efficient speakers (so, at 1-5W power at listening levels), are they two different levels of Class A quality?
CLASS A POWER RATINGS
In well designed SS class A power amps I was told that although power could increase to double in class AB mode from speaker demands of 8 ohms to 4 ohms, class A suffered to be cut in half.
For example a class A denominated amp rated at 50 watts class A into 8 ohms would double to 100 watts class AB into a 4 ohm load but only have 25 watts of class A power before switching to class AB.
But I've noticed of late claims of manufacturers stating their amps double their class A power as impedance demands are halved.
So is the explanation that technology has advanced ?