This circuit is from Motorola's 1990 Linear Databook. The transistors allow equivalents and the output power depends on the supply voltage. The power supply must be 30 V symmetrical.
The integrated circuit used in this application is not very common. The circuit is intended for...
The focused circuit was found in the National Semiconductor's Linear Applications Handbook of...
The TDA2040 is not a common IC these days, but if you find one you can build this high quality...