When the pros need an EQ, they turn to dbx. With a proven trackrecord that spans four decades, dbx EQs are the industry standard fortouring, studios, and audio installations. With the dbx heritage ofrevered pro EQs, the 231s meets the needs of the most demanding soundreinforcement environments, while offering the simplicity ofstraightforward controls. The dbx 231s includes two 31-band channels of 1/3-octaveequalization, ±12 dB input gain, switchable ±6 dB or ±12 dB boost/cutrange, 20mm nonconductive sliders, an intuitive user interface, andoutput level metering. From its extended 10Hz to 50kHz frequencyresponse and 112 dB dynamic range to the quality componentry andmeticulous attention to detail, the 231s offers exceptional sound andrugged reliability that guarantees you will always sound your best.