A guitar amplifier is an electronic device that increases the sound of an electric guitar. It takes the weak electrical signal produced by the guitar's pickups and boosts it, allowing the sound to be heard through speakers. Amplifiers come in various types, including tube amplifiers, solid-state amplifiers, and modeling amplifiers, each offering different sound qualities and features. Most guitar amplifiers have controls for adjusting volume, tone, and effects, enabling musicians to shape their sound. They can be used in various settings, from small practice spaces to large concert venues. Many guitarists also use effects pedals to further enhance their sound when connected to an amplifier.