(27-06-2014 16:22)andron011 писал(а):  то есть у 64 и 64 mkII - нет класса А

Так и нету чистого А, у 64мк2 есть "КвартерА" - три варианта ТП выходных транзисторов в зависимости от выходной мощности.


Вот цитата из описания Marantz PM-84D; в 64мк2 также реализовано:

"The MOS FET parallel push pull stream-composition output stage is controlled for Quarters A and AVSS.
The quarter A operated with the pure Class-A to 1/4 (quarter) of the maximum output, and 25Wx2, by more than it, it shifted to AB class automatically and high power has been obtained. It is reproducible, maintaining the linearity which was excellent in the vast power area by this.
Furthermore, in AVSS, the change of a pure Class-A and AB class is interlocked with, output supply voltage is shifted, and the power element is driven in the ideal conditions."