When an engineer needs a Graphic EQ who do they turn to? Dbx of Course! And no wonder with a proven track record dbx® EQs are the industry standard for touring studios and audio installations. The dbx 231s includes two 31-band channels of 1/3-octave equalization ±12 dB input gain switchable ±6 dB or ±12 dB boost/cut range 20mm nonconductive sliders an intuitive user interface and output level metering. From its extended 10Hz to 50 kHz frequency response and 112 dB 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. This EQ is sure to find a home in your studio on tour or at your venue.