The Yamaha KX-490 is a dual cassette deck that was part of Yamaha's line of audio components during the late 1980s and early 1990s. It is designed for both playback and recording, featuring a range of capabilities that make it suitable for enthusiasts who appreciate cassette tapes. The KX-490 supports Dolby B and C noise reduction systems, which help improve sound quality by reducing hiss during playback and recording. It offers a bias setting that users can adjust for optimal performance with different types of cassette tapes. The unit includes features such as auto reverse, allowing seamless playback of both sides of the tape, as well as dual mic inputs for recording. The front panel includes LED indicators, mechanical control buttons for various functions, and a digital display for tape operation. This cassette deck is built with a robust design, ensuring durability over time, and features a stylish finish that complements other audio equipment. The KX-490 can be integrated into a variety of audio systems, allowing users to enjoy their cassette collection in high quality.