DBX 231s Dual Channel 31 Band Graphic EQ Equalizer

Rackmountable Dual Channel 31 band Equalizer
DBX 231s Dual Channel 31 Band Graphic EQ Equalizer


When the professionals need an EQ, they turn to dbx. With a proven track record that spans four decades, dbx EQs are the industry standard for touring, studios, and audio installations. With the dbx heritage of revered pro EQs, the 231s meets the needs of the most demanding sound reinforcement environments, while offering the simplicity of straightforward controls.

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 50kHz 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.

  • Dual 31-band, 1/3-octave Constant Q frequency bands
  • Switchable boost/cut ranges of ±6 or ±12 dB
  • Front panel bypass switch
  • ±12 dB input gain range
  • 4-segment LED ladders for monitoring output levels
  • XLR and TRS Inpts and Outputs
  • Frequency Repsonse of <10Hz to >50kHz
  • Dynamic range of greater than 108dB



  • Connectors:  1/4" TRS, female XLR (pin 2 hot)
  • Type:  Electronically balanced/unbalanced, RF filtered
  • Impedance:  Balanced 40k ohm, unbalanced 20k ohm
  • Max Input Level:  >+21dBu balanced or unbalanced
  • CMRR: >40dB, typically >55dB at 1kHz


  • Connectors: 1/4" TRS, male XLR (pin 2 hot)
  • Type:  Impedance-balanaced/unbalanced, RF filtered
  • Impedance:  Balanced 100 ohm, unbalanced 50 ohm
  • Max Input Level: 

>+21dBu balanced/unbalanced into 2k ohm or greater

>+18dBm balanced/unbalanced (into 600 ohm)

System Performance

  • Bandwidth: 20Hz to 20kHz, +0.5/-1dB
  • Frequency Response: <10Hz to >50kHz, +0.5/-3dB
  • Dynamic Range: Typicall >112dB
  • Signal-to-Noise: Typically >95dB
  • THD+Noise: <0.003%
  • Interchannel Crosstalk<-90dB, 20Hz to 20kHz
  • Dimensions: 8.9cm x 15.24 x 48.26 cm
  • Weight: 2.81 kg
  • Shipping Weight: 3.58 kg


  • Standard Delivery - Free
  • Express Delivery - $20
  • Store Pick Up (South Melbourne) - Free

Soundcorp will ship orders the first business day once all funds have cleared.


Purchases from Soundcorp are protected by Australian Consumer Law.

Please view our Shipping & Returns Policy page for full details.

  • Avixa