Sansui AU-X11 high-end integrated amplifier

Description

? 1. Full Description with Technical Points

The Sansui AU-X11 is a flagship integrated amplifier released in the early 1980s, representing the pinnacle of Sansui’s engineering expertise during the brand’s golden era. Designed for audiophiles and serious music enthusiasts, the AU-X11 features cutting-edge technology, exceptional power delivery, and precise tonal balance.

⚙️ Technical Highlights & Features

• Power Output: 160 watts per channel into 8 ohms (both channels driven, 20Hz-20kHz)
• Frequency Response: 5Hz to 100kHz (-3dB) for ultra-wide bandwidth reproduction
• Total Harmonic Distortion (THD): An incredibly low 0.003% (at rated power)
• Damping Factor: 120 at 8 ohms, ensuring excellent speaker control and deep, tight bass response
• Phono Stage: Supports both Moving Magnet (MM) and Moving Coil (MC) cartridges, with selectable impedance for precise matching
• Signal-to-Noise Ratio:
  • Phono MM: 90 dB
  • Phono MC: 75 dB
  • Line Input: 110 dB
• Super Feedforward System: A proprietary Sansui technology that predicts and corrects distortion in real-time before it reaches the output stage, ensuring the cleanest possible audio signal
• Dual Mono Design: Independent power supplies and amplification circuits for left and right channels, greatly improving stereo separation and imaging
• Massive Toroidal Transformer: Provides clean, high-current power with minimal noise, supporting high-dynamic-range playback
• Construction: Premium-grade components, including low-noise resistors, custom capacitors, and oversized heat sinks for thermal stability and long-term reliability
• Inputs & Outputs: Multiple line-level inputs, two phono inputs, and both fixed and variable outputs for flexible system integration
• Tone Controls: Precision bass, midrange, and treble adjustments, along with a subsonic filter and tone defeat option for pure signal path playback

? Playing & Functional Condition

• Tested and working perfectly across all inputs and outputs
• Phono stage delivers clear, low-noise performance with excellent channel separation
• Tone controls, filters, and switches operate without crackling or dropouts
• Power output is strong, with no distortion even at high volumes
• Channel balance is perfect, with no drift or imbalance