The Sony TC-KE 400 S is a cassette deck that was part of Sony’s line of audio equipment, designed for playing and recording cassette tapes. This model features a dual-capstan mechanism which provides precise tape handling and improved sound quality by reducing wow and flutter. The TC-KE 400 S is equipped with features such as bias adjustment, and Dolby Noise Reduction for clearer playback and recording. Its sleek design typically incorporates a front-loading mechanism, making it user-friendly. The device might also offer tape type selection options, helping users achieve the best results depending on the cassette type being used. This model typically has a peak level meter to assist in setting recording levels accurately. The TC-KE 400 S was made with a focus on both usability and performance, catering to audiophiles who appreciate analog tape formats. Specifications may include frequency response ranges, signal-to-noise ratios, and total harmonic distortion metrics, which are important factors for evaluating audio fidelity.