The circuit shown is from the 1994 Linear Applications Handbook by National Semiconductor. The maximum power is 7 W with a 8 ohms load and the power can be between 9 and 14 V.
We found this interesting circuit in a 1969 American documentation. It shows a solution with...
Here is a high-quality intercom for demanding readers. The circuit is from a 1982 documentation. Of course,...
This circuit can be found on this website in similar versions. The power supply is given in...