A phono preamp, also known as a phono stage or phono amplifier, is a specialized preamplifier designed to amplify the signal from a turntable's cartridge to a level suitable for the main amplifier or audio system. It also applies the correct equalization curve (RIAA curve) to the signal, ensuring accurate playback of vinyl records. Phono preamps are essential for vinyl setups as most turntables require them to produce audible sound.