The Pioneer SG-9800 is a stereo graphic equalizer that was first introduced in 1979. It was part of Pioneer's top-of-the-line "G" series of audio equipment and was designed for use in high-end home audio systems.
The SG-9800 offered a range of advanced features that helped to set it apart from other graphic equalizers of its time. It included ten different graphic bands, with seven bands of adjustments for each channel and a variable Q factor control. This allowed users to fine-tune the equalization to achieve the desired sound for their audio system.
The SG-9800 also featured Pioneer's patented "Non-Switching Amplifier" technology, which helped to maintain dynamic range and preserve the quality of the audio signal. The system also included a spectrum analyzer with an LED display that helped to visualize changes in the audio signal in real-time.
In terms of build quality, the SG-9800 was a robust and reliable unit, with a solid construction and high-quality components. Its elegant design and easy-to-use interface made it a popular choice among audiophiles and music enthusiasts.
Overall, the Pioneer SG-9800 was an advanced and high-quality graphic equalizer that offered exceptional sound quality and versatility, making it a highly sought-after unit among vintage audio enthusiasts to this day.