The electronic device used to amplify sound, often associated with music performances, is called an amplifier. Amplifiers increase the amplitude of audio signals, making sound louder and clearer through speakers. They are crucial components in sound reinforcement systems, musical instruments, and home audio setups. There are various types of amplifiers, such as tube and solid-state amplifiers, each with unique characteristics that affect sound quality and performance. Amplifiers play a vital role in delivering rich audio experiences in live performances and home entertainment systems.