The 40W Amp OCL 2N3055+MJ2955 is easy to build,
and very inexpensive. To use Power Supply +35V -35V 2A.
Transistor 2N3055+MJ2955 must be mounted on heatsink.
Can be directly connected to CD players, tuners and tape recorders.
Circuit 40W Amp OCL 2N3055+MJ2955