Sansui AU-2200 (1975-1976)

At 8.5kg, it carries the heft of serious 1970s engineering in a clean silver chassis

Overview

The Sansui AU-2200 is a stereo integrated amplifier built during the peak of Japan’s hi-fi ascent, manufactured in Japan between 1975 and 1976. Though compact in power rating, it reflects Sansui’s commitment to solid-state design and functional elegance during a period when the brand was refining its reputation for accessible, well-constructed audio gear. and while it lacks the wattage of higher-end contemporaries, its circuitry suggests careful attention to signal path integrity. It was designed for listeners who valued reliability and sonic coherence over raw output, fitting neatly into modest living spaces or secondary systems where precision mattered more than volume.

Weighing 8.5kg and measuring 420mm wide, the AU-2200 occupies a mid-tier footprint—neither a shelf-filler nor a minimalist puck. Its build incorporates 34 transistors and 18 diodes, indicating a moderately complex discrete design for its class. Two speaker outputs are provided, allowing for A/B selection, a practical touch for owners with multiple pairs of speakers. The amplifier’s specifications suggest a balanced approach: rated at 20 watts per channel into 8Ω, though some documentation reports 10 watts per channel, a discrepancy that has led to ongoing discussion among collectors. Regardless, the frequency response is stated as 20Hz to 20kHz, with 0.5% total harmonic distortion—modest but acceptable for the time.

Specifications

Key Features

STK016 Output Modules

The amplifier employs STK016 integrated output modules—compact, multi-transistor assemblies mounted on a dedicated printed circuit board. In the AU-2200, they form the core of the power stage, While efficient, these modules are known to fail over time,

Silver Front Panel Finish

This finish, confirmed by multiple owner reports, contributes to its understated aesthetic—functional rather than flashy.

Two-Pair Speaker Outputs

Owners note the inclusion of two sets of speaker terminals, enabling A/B speaker selection. This feature adds versatility, allowing users to switch between different speaker pairs—perhaps one for nearfield listening and another for room-filling sound—without manual rewiring. The minimum load impedance is specified at 4Ω,

Collectibility & Value

The Sansui AU-2200 trades in the used market at around €275 for units in excellent condition. However, its value is highly dependent on operational status—given the vulnerability of the STK016 output modules, units requiring repair are often considered project lots. Recapping—replacing aging electrolytic capacitors—is a common and often necessary restoration step, with enthusiasts frequently specifying Nichicon or Elna Silmic II capacitors for critical audio-path positions. A dedicated speaker terminal upgrade kit is available for owners seeking banana plug compatibility, suggesting an active niche community. Advice from owners is clear: unless prepared for repair work, buyers should avoid units not confirmed as fully functional.

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Related Models

• Sansui PM C100 (Unknown)
• Sansui 6060 (1975-1977)
• Sansui 551 (1973-1975)
• Sansui AU 555 (1968-1971)
• Sansui CA 3000 (1974-1977)
• Akai AM-2850 (1975)
• Akai AP-206 (1975)
• Nakamichi BX-1 (1985)
• Acoustic Research research-ar-17 (1978)
• Acoustic Research AR-19 (1994)