The Sansui CA-303 is a stereo preamplifier that was part of the company's lineup during the late 1970s. It features a classic design with a vintage aesthetic, typically characterized by a sturdy metal chassis and a functional layout. The CA-303 includes various inputs for connectivity, accommodating sources such as turntables, tape decks, and other audio components. It provides tone control options to adjust bass and treble frequencies, allowing users to customize their listening experience. Additionally, the preamplifier may include a phono stage for direct connection with turntables. Its output can be connected to power amplifiers or receivers for driving speakers. The device is generally noted for its warm sound signature and reliability, making it a popular choice among audio enthusiasts. Among its specifications, it typically has a frequency response that spans the audio range and offers a decent signal-to-noise ratio, contributing to the overall clarity of sound. The build quality often features high-grade components, and the CA-303 may include OLED or analog meters as part of its interface, enhancing its appeal to vintage audio lovers.