The Gravity 7 Band Graphic Equalizer GR-EQ9 is a high-quality signal processor designed for car audio systems. With its brand reputation of Gravity, this equalizer offers precise control over the frequency response of your audio system. The 7-band design allows for fine-tuning of specific frequencies to achieve a balanced and optimized sound quality in your vehicle. The manufacturer part number GR-EQ9 ensures easy identification and compatibility with your car audio setup.