Sansui AU-11000

The Sansui AU-11000 is a home audio integrated amplifier built by Japanese audio electronics manufacturer Sansui during the mid 1970s. The amplifier is known across the audiophile community for its high-output power and low Total harmonic distortion (THD).

The AU-11000 has an output power of 110 watts-per-channel, and was one of the earliest home audio amplifiers to use multiple transistors per channel using a "Push-Pull" method to add more amplification power. The AU-11000 uses independent circuitry in the amplification process, in such a way that, each individual channel has its own circuits. This means everything from the power supply to the bias control board all have 2 identical and independent circuits per channel to separate the 2 stereo channels. This also minimizes the Total Harmonic Distortion within the amplifier down to 0.08%.

The AU-11000 has its own power protection built into the amplifier. When the power switch is turned to the "ON" position, the power light comes on as green for a second, and turns red for a few seconds until the power protection circuitry has confirmed it is safe to power-up. Once it has finished, the power light turns and remains green until the amplifier is turned off. The AU-11000 also has its own block diagram printed on the upper-front casing.