This circuit is the factory version of the LM386 low-power amplifier. The sound quality is excellent, and the power can be supplied with voltages from 6 to 16 V.
This circuit is from a Popular Electronics from the 80's. The components used are not common...
This circuit for 6 lamps was found in old American documentation. The supply is of high voltage...
The circuit is from the 1994 National Semiconductor Linear Applications Handbook but can be...