7 BAND CAR EQUALIZER EQ 7 VOLT PRE-AMP GR-EQ9 GRAVITY The Gravity GR-EQ9 1/2 DIN 7 band Graphic Equalizer will allow you to fine-tune and adjust, your sound system, until it gets perfect sound. This equalizer has sub woofer control, and built-in high pass and low pass crossovers. This equalizer is made by one of the most trusted brands in the industry, and it will do what it is supposed to do when you plug it in. It will allow you to adjust the frequencies, and the loudness of the mids, highs, and lows coming out of your speakers. Features: ---7 Band 1/2 din Equalizer with rotary controls ---12 dB Boost/Cut adjustable @ 50 Hz, 125 Hz, 320 Hz, 750 Hz, 2.