A phono preamp, or phono stage, is an electronic device that amplifies the weak electrical signal produced by a turntable when playing vinyl records. This signal is too low to be processed by standard audio equipment, so the phono preamp boosts it to a level suitable for a receiver or amplifier. In addition to amplification, a phono preamp also applies equalization to the signal. This equalization corrects the frequency response of the record, ensuring that the sound is balanced and true to the original recording. Many audio enthusiasts consider a quality phono preamp essential for optimal vinyl playback.