The dbx 131 is a Single 31 Band Graphic Equalizer. 1/3 Octave, 1U Rack Design.
Get the simplicity of straightforward controls in a package designed to meet the needs of even the most demanding sound-reinforcement situatiosn with the dbx 131. This equalizer features single-channel, 31 1/3 octave bands, ISO frequency centers, ± 12dB input gain range, and switchable 50Hz/12dB per octave low-cut filter. You'll also find 20 mm faders, selectable ± 6dB or ±12dB boost/cut range for precise gain adjustments, XLR barrier strip, and 1/4" TRS connectors for installation ease.
The 12 Series Equalizers were engineered with precision to offer years of maintenance-free operation.