The 50W Power Amplifier OCL Mosfet (K1058 + J162) is easy to build, and very inexpensive. To use Power Supply +35V -35V at 2A. Power Mosfet (K1058 + J162) must be mounted on heat sink. Can be directly connected to CD players, tuners and tape recorders.
If you want a good amplifier, at affordable prices, for you to enjoy at home I recommend this circuit, which has excellent sound quality, is not lose their sound expensive.