The most used ICs are TDA2030 and TDA2003 for small audio amplifiers kits and TDA7294 for higher power amplifiers ... low impedance loads (down to 1.6 ohms) makes this circuit a good choice for cheap ...

Take note that the circuit C is to be connected between pins 1 and 5 of the IC. The power output is around 550 mW at 16 ohm speaker impedance. This audio frequency amplifier is ideal for small battery ...

The folks at [ElectroSmash] recently released 1Wamp – a one watt, open hardware, Guitar amplifier ... detailed circuit analysis of every part of the design, starting from the power supply ...