The Sansui D-290 is a dual cassette deck that combines a blend of functionality with a sturdy build. It features a tape mechanism that supports standard and metal tapes, offering a range of playback and recording capabilities. The design emphasizes durability and quality, incorporating features like auto-reverse for continuous play and a peak level meter for monitoring recording levels. The unit is equipped with Dolby B and C noise reduction systems to enhance sound quality by minimizing tape hiss. Specifications include a frequency response that varies from 20 Hz to 20 kHz, which delivers a wide audio range. The signal-to-noise ratio measures at an impressive level, contributing to clearer playback. The cassette deck also includes a variety of input/output options, making it versatile for different audio systems.