An amplifier is a device that increases the power of a signal. Amplifiers are used in a wide variety of applications, including audio, video, and telecommunications. When choosing an amplifier, it is important to consider the following factors:
Power: The power of an amplifier is measured in watts. The higher the wattage, the more powerful the amplifier. The power of an amplifier should be matched to the power of the speakers that it will be used with.