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dbx iEQ-31 Graphic EQ 

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Uncompromised dbx sonic integrity enhanced with a powerful array of flexible features define the dbx iEQ-31 Graphic EQ. You get AFS one-touch feedbac...Click To Read More About This Product

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Dual 31-band EQ with world-class noise reduction.

Uncompromised dbx sonic integrity enhanced with a powerful array of flexible features define the dbx iEQ-31 Graphic EQ. You get AFS one-touch feedback suppression, Type V noise reduction, and PeakStopPlus limiting. Switchable ±6 or ±15dB boost/cut range; ±12dB input gain range; 40mm faders; and nonconductive nylon sliders give you precision command. 10Hz to 22kHz frequency response, 110dB dynamic range, 1/3-octave Constant Q frequency bands, and internal toroidal transformer. 1/4" TRS, XLR, and Euroblock balanced and unbalanced RF-filtered inputs and outputs.

  • Dual 15-band EQ
  • AFS one-touch feedback suppression
  • Type V noise reduction
  • PeakStopPlus limiting
  • Switchable ±6 or ±15dB boost/cut range
  • ±12dB input gain range
  • 40mm faders
  • Nonconductive nylon sliders
  • 10Hz to 22kHz frequency response
  • 110dB dynamic range
  • 1/3-octave Constant Q frequency bands
  • Internal toroidal transformer

Visionary design and revolutionary engineering combine for maximum sonic flexibility and unsurpassed quality. Order yours now.


iEQ-31 Graphic EQ

  • Inputs
    Impedance: balanced 40kohms, unbalanced 20kohms
    Max input level: >=22dBu balanced or unbalanced
    CMRR: >40dB, typically >55dB at 1kHz
    Impedance: Balanced >120ohms, unbalanced >60ohms
    Max output level: >+20dBu balanced/unbalanced into 2kohms or greater

    Bandwidth: 20Hz to 20kHz, ±-0.5dB
    Signal-to-noise ratio: >94dB, unweighted, ref +4dBu, 22kHz measurement bandwidth
    Dynamic range: >110dB, unweighted, >113dB A weighted
    THD+Noise: <0.005%, 0.02% typical at +dBu, 1kHz
    Interchannel crosstalk: <-80dB, 20Hz to 20kHz
    Operating voltage: 100VAC 50/60Hz, 120VAC 60Hz; 230VAC 50/60Hz
    Power consumption: 14W
    Mains connection: IEC receptacle
    19"W x 3-1/2"H x 7.9"D

Review Snapshot

by PowerReviews
dbxiEQ-31 Graphic EQ

(based on 3 reviews)

Ratings Distribution

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Reviewed by 3 customers

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(6 of 6 customers found this review helpful)


Pricey... But Does a Great Job!

By Anonymous

from Undisclosed

Comments about dbx iEQ-31 Graphic EQ:

We picked up this to use as our main FOH eq over a year ago and it has served us faithfully ever since. not only does it do great with regular eq'ing duties but the limiter and feedback elimintation built in has been a lifesaver many time when trying to make the high school band sound good. Although the price is higher than something like the DriveRack PA this is a great product which has never failed us once.

(1 of 1 customers found this review helpful)


Good features but not too reliable

By TechEd1

from Honolulu

About Me Experienced



    • Unreliable

    Best Uses

      Comments about dbx iEQ-31 Graphic EQ:

      Purchased this when they first came out several years ago. The feedback suppression didn't always work. The narrow (music) setting was too slow. Had to use the wide (voice) setting. Even then it was troublesome. One channel failed under warrantee and then the next one failed after warrantee. Used outdoors next to the ocean once a week. For the same price I would highly recommend the Ashley over this model. It has lasted years longer (still running) with the same use.

      (1 of 1 customers found this review helpful)


      dbx Is The Best

      By Jamming Jim

      from San Antonio, Texas

      About Me Experienced

      See all my reviews

      Ask me a question

      Verified Buyer


      • Clear Sound
      • Has Feedback Suppression
      • Professional Functions
      • Versatile


      • User Manual Very Vague

      Best Uses

      • Home Studio
      • Rehearsal studio

      Comments about dbx iEQ-31 Graphic EQ:

      After you figure out the user manual. This is a fantastic sounding digital graphic equalizer. I'm using a dbx AFS 224 to help with the feedback too, and the AFS function on the iEQ-31 works with the dbx AFS 224 beautifully. You just have to have both of them. Set up with the same settings, and they will suppress just about all of the feedback. It's like having extra feedback filters with a great sounding graphic equalizer!

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