56W from 190W(peak). This is probably the simplest amplifier without compromising power or soumd quality. Although the first stage is purely class A and would probably give very nice results the second stage is a push pull which will cause some crossover distortion (more or less depending on the biasing techniques) and would somewhat deteriorate the sound quality. Nevertheless this is the easiest you'll get at 64W with decent quality. And yes there is no such thing as a free lunch. With this amp the cost is power. A lot of continuous power dissipation will occur in the class A stage thus lowering the efficiency levels. But at least the class B amp somewhat compensates for the utterly inefficient class A stage.
