The Sansui D-X 301 iR is a cassette tape deck model produced by Sansui between 1988 and 1990, designed in Japan. This unit features a sleek black finish and is equipped with a range of functionalities suitable for audio enthusiasts. It incorporates two motors and two audio heads, optimizing performance for playback and recording. The D-X 301 iR supports various tape types, including normal, chrome, and metal, with a frequency response of 20-17,000 Hz for normal tapes, extending up to 20-19,000 Hz for metal tapes. It is also equipped with noise reduction technologies, including Dolby B and C, as well as HX-Pro, which improves audio quality by reducing tape hiss. The device's automatic reverse capability allows for seamless playback of both sides of a tape without manual intervention. Other features include a track search function, a memory repeat playback option, and a timer operation feature. Its compact size, with dimensions of 430 x 126 x 296 mm and a weight of 4.9 kg, make it a manageable addition to any audio setup. The D-X 301 iR also offers headphone output with adjustable volume, enhancing the listening experience. This model provides a signal-to-noise ratio of 72 dB when using Dolby C, ensuring clear audio reproduction.