The Sony TC-K 679 ES is a cassette deck, manufactured by Sony. It was released as part of the ES (Elevated Standard) series, which represented Sony's premium line of audio equipment. The TC-K 679 ES features Dolby B and C noise reduction, three Motor Transport Mechanism for stable tape handling, and a dual capstan drive system for accurate tape speed control. It also has various recording and playback features, such as auto tape selector, auto spacing, auto recording level, and peak hold meters. The deck has a sleek and sturdy design, with an aluminum front panel and wood-grain side panels.