The power supply for this circuit must be symmetrical at 12 + 12 V and the load must be 8 ohms. The circuit is from the 1982 SGS Linear Integrated Circuits Manual.
The circuit shown is from an old European publication. In it we have the way to activate a relay...
We found this circuit in a European publication from the 1990s. Transistors are still common types...
This circuit was found in an American documentation and can be added to common amplifiers of any...