We published this circuit in a magazine of the 90s, but it is still present by the components it uses. This is an experimental class D amplifier that provides a few watts of power, with good sound quality and excellent performance. The source must be at least 1 A with excellent filtration. The output transistors must be provided with heat radiators and the input cable must be shielded. Any changes of components may be necessary if it is found the noise of switching the reproduced sound, or some form of distortion. Critical components of this circuit are C4 and R5.
