A simple circuit diagram of a 6 watt amplifier with TA7222AP IC. It is a good quality audio amplifier IC and it has many good features like low distortion, short circuit protection, thermal shutdown, high ripple rejection etc. The required input voltage for this circuit is between 8V to 12V DC.
On 12 volt the IC is able to deliver 5.8 Watt in a 4 Ohms speaker. The circuit is easy to build and can be fit in a small place. Use heatsink with the IC. For best performance It is advised to use seperated ground for input and output.