A stereo receiver is a type of audio equipment that combines a preamplifier, power amplifier, and AM/FM radio tuner into one unit. It allows users to listen to music from multiple sources, including CD players, turntables, and digital devices, while also providing radio reception. The preamplifier adjusts the volume and tone of the audio signal, while the power amplifier increases the signal's power to drive the speakers. The radio tuner allows users to tune into AM/FM radio stations and listen to live broadcasts. Stereo receivers also typically have multiple input and output connections, such as RCA, HDMI, and USB, that allow users to connect additional devices such as televisions or gaming consoles. Some stereo receivers also feature advanced features such as Bluetooth connectivity, network streaming, and multi-room audio capabilities. They are commonly used for home entertainment systems, and their compact size and versatility make them a popular choice for many audio enthusiasts.