dbx DBX-231S 31-Band Equalizer

dbx Dual-channel 31-band graphic equalizer, 112 dB dynamic range, 10Hz to 50kHz frequency response

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What's in the box:

  • dbx 231s - Graphic EQ
  • AC Power Cable
  • Two (2) Year Warranty

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The Benchmark of Live EQs

    Dbx is known for their reliable graphics EQs, and The dbx 231s dual-channel 31-band graphic equalizer lives up to the legacy - providing 1/3-octave Constant Q control beyond the audible frequency spectrum. Equipped with a switchable ±6dB or ±12dB, the dbx 231s gives you fine control and superb sound quality. With even more features such as 20mm nonconductive sliders, an intuitive user interface, and output level metering, the dbx 231s is the professional's choice in signal processing. Sure to find a home in the studio, on tour and with installed sound venues, the dbx 231s is destined to take it's rightful place in the lineage of great dbx signal processors that guarantee 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

Specifications for the dbx DBX-231S

{ "Input Connectors" : "1/4" TRS, female XLR (pin 2 hot)", "Input Type" : "Electronically balanced/unbalanced, RF filtered ", "Input Impedance" : "Balanced 40k ohm, unbalanced 20k ohm ", "Max Input" : ">+21dBu balanced or unbalanced", "CMRR" : ">40dB, typically >55dB at 1kHz ", "Output Connectors" : "1/4" TRS, male XLR (pin 2 hot)", "Output Type" : "Impedance-balanced/unbalanced, RF filtered", "Output Impedance" : "Balanced 100 ohm, unbalanced 50 ohm", "Max Output" : ">+21dBu balanced/unbalanced into 2k ohm or greater; >+18dBm balanced/unbalanced (into 600 ohm)", "Bandwidth" : "20Hz to 20kHz, +0.5/-1dB", "Frequency Response" : "<10Hz to >50kHz, +0.5/-3dB", "Dynamic Range" : "Typically >112dB", "Signal to Noise Ratio" : "Typically >95dB", "THD+Noise" : "<0.003%", "Interchannel Crosstalk" : "<-90dB, 20Hz to 20kHz", "Bypass Switch" : "Bypasses the graphic equalizer section in the signal path ", "Low cut Switch" : "Activates the 50Hz 12dB/octave high-pass filter ", "Range Switch" : "Selects either +/- 6dB or +/-12dB slider boost/cut range", "Operating Voltage" : "100-240VAC 50/60Hz", "Power Consumption" : "15W", "Power Connector" : "IEC receptacle", "Equipment Weight" : "6.2 lbs.(2.81 kg)", "Shipping Weight" : "7.9 lbs.(3.58kg)", "Dimensions" : "3.5" (8.9cm) H x 6"(15.24cm) D x 19" (48.26cm) W" }

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