TDA 7056 A is an audio power amplifier IC that has 5 watts output power with 8 ohms speaker and 3 watts with 16 ohms speaker.
The IC is simple to wiring and needs only 6 external components to make the amplifier working. TDA 7056A working with a power supply between 4.5 - 18 volts so the IC can use a battery as power supply. if you use more than 9 volts, you need to attach small heat sink to the IC.
TDA 7056A has a very wide audio bandwidth 20 Hz to 300 KHz (Hi-fi amplifier standard frequency range = 20 Hz - 100 KHz).However, you need to keep every wire as short as possible to prevent AM frequency interfere.
C1 = 1000 uf/16 volts
C2 = 0.1 uf/film capacitor
C3 = ceramic capacitor 103 or 1000 pf
C4 = 2.2 uf/ 16 volts (you can replace the ic with film capacitor if you want cleaner sound)
R1 = 1000 ohms
IC = TDA7056 A
VR 1 = 100 Kilo-ohms potentiometer