dbx 231S Dual 31-Band Graphic Equaliser

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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

XLR and TRS Inpts and Outputs

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When the pros need an EQ, they turn to dbx. A proven track record that spans four decades, dbx® EQs are the industry standard for touring, studios, and audio installations. 

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. 

Features :

  • 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

Technical :

  • Input Connectors : 1/4" TRS, female XLR (pin 2 hot) 
  • 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 
  • Weight : 2.81 kg
  • Dimensions : 8.9cm H x 15.24cm D x 48.26cm W


Barcode # 691991401206
Brand dbx
Shipping Weight 4.0000kg
Shipping Width 0.300m
Shipping Height 0.130m
Shipping Length 0.570m
Shipping Cubic 0.022230000m3

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