The dbx® 1231 Dual 31-Band Graphic Equalizer delivers precise sound shaping and professional-grade control for live and studio applications. With 31 sliders per channel marked at 1/3 octave intervals, you get smooth, accurate frequency adjustments for any environment. An input gain control of -12dB to +12dB ensures proper signal matching, while selectable boost/cut ranges (±6dB or ±15dB) provide flexibility for both subtle corrections and dramatic EQ changes.
 
Designed for reliable performance, the dbx 1231 features an internal magnetically isolated power transformer for clean operation and multiple I/O options including XLR, 1/4" TRS, and barrier strip connections with ground lift. Additional features include a switchable 40Hz low-cut filter, EQ bypass with LED indicator, and four-LED output level monitoring with clip indication. With a wide frequency response (10Hz–50kHz), dynamic range up to 115dB, and rugged 3U rackmount design, the dbx 1231 is built to deliver clarity, power, and precision to any sound system.