Amplifier (noun)

An electronic device that increases the strength of a signal, especially an audio signal.

Origin:

Early 19th century: from french amplificateur, from latin amplificare "enlarge".

Examples:

1. The amplifier was necessary to boost the sound from the guitar so that it could be heard over the other instruments.
2. The amplifier was built into the speaker, allowing for convenient and efficient sound reproduction.
3. Some musicians prefer to use tube amplifiers for their warm, rich sound.
4. The amplifier was adjustable, allowing the user to fine-tune the sound to their liking.
5. In a sound system, the amplifier is an essential component, responsible for boosting the sound from the source to the speakers.