A preamp, or preamplifier, is an electronic device that boosts weak audio signals before they are sent to a power amplifier. It is commonly used in audio equipment, such as microphones, guitars, and turntables, to enhance sound quality and ensure that the signal is strong enough for further processing. Preamps can be found in various forms, including standalone units and built-in components within mixing consoles or audio interfaces. They often feature controls for adjusting gain and tone, allowing users to shape the sound to their preference before it reaches the main amplification stage.