This circuit was found in documentation from the 1980s. The integrated circuit is from the time and the voltage depends on the desired power, and the component's datasheet should be consulted.
Found in a 1980’s documentation, this circuit must have its signal applied to an amplifier stage. The...
We show only one of the channels of an excellent audio preamplifier with the LM382 integrated...
This circuit is from 1983 documentation. The author shows us an experimental circuit of a siren...