The Sony TC-FX 400 is a compact cassette deck introduced in the early 1980s, designed for use with home audio systems. It features mechanisms driven by precision DC servo motors, providing smooth operation and reliable tape handling. The deck is compatible with standard Type I, Type II, and Type IV cassette tapes, allowing users to enjoy a wide variety of recordings. The TC-FX 400 includes features such as auto-reverse playback, enabling continuous listening without user intervention. It is also equipped with a three-head configuration, which allows for better recording and playback fidelity. The unit comes with a built-in peak level meter, providing visual feedback for optimal recording levels. In terms of connectivity, it includes RCA inputs and outputs for easy integration into home audio setups. The sturdy build and design further enhance its durability and longevity. Overall, the Sony TC-FX 400 delivers a solid performance for cassette tape enthusiasts.