Clarion Mobile Electronics EQS746 1/2 DIN Graphic Equalizer with Built-in Crossover This advanced rotary equalizer will provide 7 band of equalization and sound personalization. At each of the band centers, a 12 dB boost/cut is to precisely adjust the frequencies of each band. It also features a dedicated subwoofer level output for enhanced subwoofer control. On the back, there is an auxiliary input for playing an additional audio source. The Clarion EQS746 comes with brackets for mounting underneath a dash, in a console, or anywhere else that it fits. For an ideally tuned system, the Clarion EQS746 equalizer can tune a system where other equalizers fall short.