A Mixer is an audio device used to combine, process, and adjust the levels of multiple audio signals. It allows users to balance and fine-tune individual sound sources, such as microphones, instruments, and playback devices, to create a cohesive output. Mixers are commonly used in live sound environments, recording studios, and broadcast settings.

An Amplifier is an electronic device that increases the power of audio signals. It takes low-level audio signals from sources like mixers and boosts them to drive loudspeakers, enabling the sound to be heard at higher volumes. Amplifiers are widely used in sound systems for events, concerts, public address, and home audio setups.

When combined, the Mixer & Amplifier setup forms the backbone of many professional audio systems, allowing for efficient sound mixing and amplification.