The McIntosh C30 is a vacuum tube preamplifier produced by McIntosh Laboratory. It features a distinctive design with a glass front panel that displays the signal levels through illuminated meters, along with a classic black and silver finish. The C30 incorporates multiple line-level inputs, enabling it to accommodate various audio sources. It also includes tone controls for adjustments to bass, midrange, and treble frequencies, allowing users to tailor their listening experience. The unit has a built-in phono stage, providing compatibility with vinyl record players. Further enhancing its functionality, the C30 also features two sets of outputs for connection to power amplifiers or other components in an audio setup. Its construction is marked by attention to detail and high-quality components, designed to deliver excellent audio performance.