The integrated circuit and configuration are uncommon. However, the sound quality is good. The circuit is from the 1983 Intersil Databook. The output transistors must be provided with heat sinks.
This is one of many power control or dimmer configurations that we have found on this site and in...
Using a temperature sensor integrated circuit LM3911 from National Semiconductor (now Texas...
This circuit for the 60 kHz range was found in 73 magazine and published in 1995. The circuit uses...