Up for sale is a vintage Sansui QS-500 quadraphonic synthesizer/decoder, fully tested and in solid working condition. This unit has been carefully checked to ensure all channels, inputs, and outputs are functioning properly, making it a reliable addition to any vintage audio setup. This unit has been a gem in my setup.
This model is highly desirable for its ability to both decode QS matrix quadraphonic signals and synthesize 2-channel audio into immersive 4-channel sound. Additionally, it can be used as a rear channel amplifier, making it an excellent solution for building or expanding a quadraphonic system.
Functionality
Fully tested – all channels working properly
All inputs and outputs verified
Controls cleaned and serviced with DeoxIT
Smooth operation across all switches and knobs
Strong, clean quadraphonic output
Key Features
QS matrix quadraphonic decoder
2-channel to 4-channel synthesizer mode
Can function as a rear channel amplifier
Multiple connection options for flexible system integration
Classic warm Sansui sound
Cosmetic Condition
The unit is in good overall cosmetic condition.
Scratches present on the wood case (typical for its age)
