80W Stereo Audio Amplifier by TDA7294
This is a small and simple audio amplifier with TDA7294. Using 2 TDA7294 for stereo (2×80 watt) mode and bridge mode (180 watt). The TDA7294 for use as class AB audio amplifier.
Etching layer and component layer of PCB shown below as an sample. You can use those for ease.
For the fuel of this amplifier, you can use an easy power supply for two modules. It work symmetrically with a 6A easy bridge rectifier, and 2 large polarized electrolytic capacitors, 10000μF and 22000μF/50v.
[source:FreeCircuit]