The Sansui AU-777D is an integrated amplifier that was popular during the 1970s. It features a solid build quality, typical of the vintage audio equipment produced during this era. The amplifier delivers a power output of approximately 50 watts per channel into an 8-ohm load, providing ample power for driving a variety of speakers. The AU-777D is known for its warm, rich sound signature, which is enhanced by its all-discrete transistor design. It includes a range of inputs for different audio sources, including phono, tape, and aux, along with tone controls for treble and bass adjustments. Additionally, there is a loudness control and a selector switch for speakers A and B. Its sleek design is complemented by wood paneling and a polished front face, exhibiting a classic style that appeals to vintage audio enthusiasts. The amplifier is also equipped with a high-quality phono stage, making it suitable for vinyl playback, which adds to its versatility for music lovers seeking a nostalgic listening experience.