[Ynze] has built an audio ... design that works, and built from there. One of the interesting things about [Ynze’s] amp, as well as many of the Gainclones, is the fact that they use no circuit ...

Thus the amplifier is only one part of the circuit ... in amplifier design beyond a simple THD measurement of the amplifier block itself. Is this £10 Chinese audio kit better than any transistor ...

Design engineers can evaluate operating efficiencies of audio amplifiers while using standard benchtop measurement systems.