Wein Bridge Oscillator with a voltage divider-follower stage and a BJT load-bearing stage for approx. 5V rail-to-rail output; current limited by BJT's and PS's capabilities. This design allows for approx. 18W max output at approx. 75W max draw (provided that the BJT's are properly cooled). Change voltage divider value or use a potentiometer for different output voltages; 20V R-to-R rec'd as max. Requires +- 12V Power Supply. Circuit tuned for approx. 400Hz, can work at different frequencies but may require percise tuning. Testing done on Falstad Circuit Sim, no real circuit tested yet.