Kickers KQ9 allows for precise sound tuning and full system control right from you dash. With a full 9 bands of equalization, you can cut or boost select frequencies up to 12dB. Plus, the 9th bands center frequency is fully variable for precise sub-bass tweaking. The front and rear outputs have a dedicated fader control for proper image balancing. There are even dual 18dB/octave crossovers with a variable subwoofer frequency and output level control. Other features include high- or low-level inputs for installation flexibility, and dual selectable illumination colors.