Sansui AU-3300

The Sansui AU-3300 is a highly regarded solid-state integrated stereo amplifier manufactured from 1973 to 1975, designed to capture the performance characteristics of Sansui's premium professional series in a more accessible chassis. This model delivers a stable, continuous 35 watts per channel into an 8-ohm load across a frequency response of 15 Hz to 30,000 Hz, maintaining a total harmonic distortion (THD) of less than 0.25% at full rated output. The internal engineering utilizes a pure complementary output system alongside a two-stage direct-coupled equalizer circuit that incorporates low-noise silicon transistors to optimize signal purity. Its front panel offers an array of analog adjustments, including a click-stop tone control system, a dedicated loudness compensation switch, and high-cut and low-cut filters operating at a 6 dB per octave slope to tame sub-bass rumble or high-frequency hiss. Source routing is anchored by an integrated phono equalizer stage built specifically for moving magnet cartridges, supplemented by a front-panel microphone mixing circuit with an independent level control that feeds directly into the recording terminal outputs. Housed in a compact, signature mid-1970s black enclosure with satin-finished aluminum control knobs, the unit accommodates two independent sets of speakers and serves as an exceptionally musical, reliable foundation for secondary vintage hi-fi systems or desktop analog setups.