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 systems to enhance the sound quality of microphones, instruments, and other audio sources. By increasing the signal strength, a preamp helps to reduce noise and distortion, ensuring clearer sound reproduction. Preamp devices can be found in various forms, including standalone units and built-in components within audio equipment like mixers and audio interfaces. They are essential for achieving optimal sound levels and are often used in professional recording studios and home audio setups.