Stereo amplifiers are primarily intended for two-channel audio reproduction, powering two speakers (or subwoofers). AV receivers, on the other hand, are more adaptable and cater to multi-channel audio installations, which are widely utilized in home theatre systems. Amplification, audio processing, and video switching capabilities are all built into AV receivers, making them ideal for complex audio-visual installations. While stereo amplifiers are designed to provide high-quality sound in stereo arrangements, AV receivers provide more capabilities and connectivity choices to meet a larger variety of audio and video applications.