dbx 231s Dual Channel 31-band Equalizer

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Pitbull Audio
National City, CA, United States
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About This Listing

Exceptional sound and rugged reliability

When the pros 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.

Sure to find a home in the studio, on tour and with installed sound venues, the dbx 231s is destined to take its rightful place in the lineage of great dbx signal processors that are the professional's choice in signal processing. With such affordable quality, there's no longer any excuse for compromising your sound.


  • 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 Response of <10Hz to >50kHz
  • Dynamic range of greater than 108dB
Specifications Input Connectors1/4" TRS, female XLR (pin 2 hot)Input TypeElectronically balanced/unbalanced, RF filteredInput ImpedanceBalanced 40k ohm, unbalanced 20k ohmMax Input>+21dBu balanced or unbalancedCMRR>40dB, typically >55dB at 1kHzOutput Connectors1/4" TRS, male XLR (pin 2 hot)Output TypeImpedance-balanced/unbalanced, RF filteredOutput ImpedanceBalanced 100 ohm, unbalanced 50 ohmMax Output>+21dBu balanced/unbalanced into 2k ohm or greater; >+18dBm balanced/unbalanced (into 600 ohm)Bandwidth20Hz to 20kHz, +0.5/-1dBFrequency Response<10Hz to >50kHz, +0.5/-3dBDynamic RangeTypically >112dBSignal to Noise RatioTypically >95dBTHD+Noise<0.003%Interchannel Crosstalk<-90dB, 20Hz to 20kHzBypass SwitchBypasses the graphic equalizer section in the signal pathLow cut SwitchActivates the 50Hz 12dB/octave high-pass filterRange SwitchSelects either +/- 6dB or +/-12dB slider boost/cut rangeOperating Voltage100-240VAC 50/60HzPower Consumption15WPower ConnectorIEC receptacleUnit Weight6.2 lbs.(2.81 kg)Shipping Weight7.9 lbs.(3.58kg)Dimensions3.5" (8.9cm) H x 6"(15.24cm) D x 19" (48.26cm) W


Product Specs

ConditionMint (Used)
Mint items are in essentially new original condition but have been opened or played.learn more

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