The LM1875 is a 20W Class AB audio amplifier with a wide operating voltage and high bandwidth. The IC can driver 20W speakers with a maximum current of 4A and can also go to a maximum of 30W. It can operate in both with single rail and dual rail power supply, and has some in-built protection features making it robust.

The LM1875 is breadboard friendly and hence can be easily tested using a breadboard. A sample application circuit for LM1875 is given below. The datasheet given at the bottom of this page consists of more details on this design.

Features:

• Low frequency class AB amplifier most suited for audio amplification
• Operating Voltage: 16V to 60V
• Output: 20Watts with 4Ω/8 Ω speaker
• Output Current: 4A
• Open Loop Gain Gain: 90dB
• Bandwidth: 70KHz
• Short circuit and thermal protection is available
• Breadboard friendly

Package: TO-220

Datasheet: https://components101.com/sites/default/files/component_datasheet/LM1875.pdf