Dual 31 Band Graphic Equaliser - 

When the pros need an EQ, they turn to dbx. With a proven track record that spans four decades, dbx® EQs are the industry standard for touring, studios, and audio installations.The231s graphic equaliser includes 31 band channels of ⅓ octave equalization, ±12dB input gain, switchable ±6dB or ±12dB boost/cut range, 20mm non-conductive sliders, an intuitive user interface, and output level metering. From their extended 10Hz - 50kHz frequency response and 112dB dynamic range to the quality componentry and meticulous attention to detail. The 231s offers exceptional sound and rugged reliability that guarantees you will always sound your best.