The integrated circuit used in this amplifier is not very common today. This amplifier was found in the 1977 National Semiconductor Audio Handbook. The power source must be at least 500 mA.
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...