The Sanyo RD-W 89 is a double cassette tape deck manufactured by Sanyo between 1987 and 1989 in Japan. This model features high-speed synchro dubbing, allowing users to duplicate tapes efficiently. It supports Dolby B noise reduction, enhancing audio quality, and offers bias/EQ settings for different tape types, including normal, high bias, and metal. The device is equipped with 5-segment LED displays for easy monitoring of levels and soft touch buttons for intuitive operation. It also includes a headphone jack for private listening. Built with a DC servo motor, the RD-W 89 maintains a synchronous fluctuation of just 0.1% WRMS, ensuring accurate tape playback. Its signal-to-noise ratio is 57 dB without Dolby and goes up to 65 dB when using Dolby with metal tapes. The exterior of the unit is finished in a classic black color, typical of the era's design aesthetics.