AVM - я не правильно понял?

The PM-6a is a Pm-6 with the new Quarter-A "sliding Bias" system to automatically step from Class A to Class B according to the power to be output - please refer to the PM-84 page on TVK for the details of Quarter A.

и 84 тоже Quarter A - есть
At the center of the PM-84 are AVSS (or Automatic Voltage Shift Supply - two voltage rails, an old idea) and Quarter A circuits to make Class A/B more efficient.
The first 60W of the PM-84 are thus in real hot chili pepper Class A : 2x 30W.
не правильно?
то есть автомат + Quarter A - есть в 84 и 6а
про 94 пока молчим