A prototype of ST Microelectronics TBA820M audio amplifier on breadboard. It works wonderfully well with loud sound and good frequency response overall from the low frequency to the high. The loudness seems to go beyond the expected output of 1.2 watts of output power. This is a small IC in dual inline package with no heat dissipating fins. This is good for small audio amplifier applications in tone generator amplifiers, small music amplifiers, radios, bluetooth stereo speaker systems etc.