This is a traditional complementary configuration that provides good audio power with excellent sound quality. The power transistors must be equipped with radiators and the source must provide at least 2 current A. changes were made to the original diagram to enable its assembly with modern components. The supply voltage must be 30 V. The filter should be excellent to prevent any noise. The 1k trimpot adjusts the quiescent current in order to obtain the best performance without distortion. The original circuit is a from 1986 publication.
