The Sansui AU-6500 is a pre-main stereo amplifier manufactured by Sansui in Japan from 1972 to 1975. It features a classic black design and is constructed with a robust framework, measuring 440 mm in width, 140 mm in height, and 322 mm in depth. Weighing in at 11.5 kg, the AU-6500 is noted for its effective power output of 30W per channel at 8 ohms, with a dynamic power capability of 94W at 4 ohms. The amplifier is powered by a significant transformer paired with high-capacity capacitors to ensure stability and reduce distortion. It includes a variety of input options, such as two phono inputs, a tuner input, aux, and a tape deck, all designed to accommodate a wide array of audio devices. Its total harmonic distortion is less than 0.1%, demonstrating a commitment to audio fidelity. Additional features comprise tone control adjustments for both bass and treble, loudness functionality, a muting option, and connections for a four-channel adapter. The AU-6500 also incorporates a protective circuit for enhanced safety during operation, underscoring both its high performance and practicality. The amplifier was offered at an original price of approximately 59,900 Yen in 1973.
