A tube preamplifier, also known as a tube preamp, is a type of preamplifier that uses vacuum tubes to amplify and control the volume of audio signals before they are sent to a power amplifier. In contrast to solid-state preamps, which use transistors and other solid-state components, tube preamps use vacuum tubes to amplify the signal.

Tube preamps are known for their warm, natural sound and are popular among audiophiles and music enthusiasts who value the unique character and musicality of tube-based audio equipment. They are often used in high-end audio systems and can be designed for different types of audio inputs, such as phono, CD, or digital sources.

In addition to amplification, tube preamps may also offer other features such as tone controls, EQ settings, and input selection. Some tube preamps also include advanced features such as balanced inputs and outputs, remote control, and digital signal processing.