Jim Audiomisc
pfm Member
.... 50W for a 100WPC stereo amp but one hell of a lot to get 1WPC in class A yes!
As you'll know there are many benefits to class A beyond being non switching and so not producing crossover distortion and hence many of these non switching topologies are by no means the holy grail of a cool running class A amp! Krell's sustained plateau bias is maybe one of the more successful attempts but still gets hot etc... just less so than permanent class A
Like to point out the Armstrong 732 circuit. It has the drivers connected to the output along with the output devices. This acts a bit like a 'class A filler'. 8-]