231 (discontinued)

Dual Channel 31-Band Equalizer

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With a lineage extending back to the revered 12 and 20 Series graphic equalizers, the dbx® 231 easily lives up to the dbx reputation at a price point which can find a home in the tightest of budgets. Besides including two 31-band channels of 1/3-octave equalization, the 231 also offers ±6 or ±12 dB boost/cut range; XLR, 20mm faders and 1/4" inputs; nonconductive nylon sliders; and an intuitive user interface with comprehensive output and gain reduction metering. As always, the inevitable result of our meticulous attention to detail and top-quality componentry is exceptional sound, performance, and reliability.

The 2-Series represents a major step forward in the performance of entry-level graphic equalizers. From its amazing 10Hz to 50kHz frequency response, to its 108dB dynamic range and internal toroidal transformer, the 2-Series offers out of this world specifications with a down to earth price point. Sure to find a home in the studio, on tour and with installed sound venues, the 2-Series is destined to take its rightful place in the lineage of great dbx® signal processors that are the Professional's Choice™. With such affordable quality, there's no longer any excuse for compromising your sound.

Recommended for: Portable, Tour.

Features

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

Downloads

  Version Language Size Uploaded
231 CAD drawing front   en  301 KB Aug 28, 2012
231 CAD drawing rear   en  192 KB Aug 28, 2012
231 Cut Sheet-English   en  137 KB Dec 20, 2011
231 Owner's Manual-English   en  529 KB Dec 20, 2011

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Specifications

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 108dB
Signal to Noise Ratio 90dB
THD+Noise <0.004%
Interchannel Crosstalk <-80dB, 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 100VAC 50/60Hz; 120VAC 60Hz; 230VAC 50/60Hz
Power Consumption 15W
Power Connector IEC receptacle

Support/FAQs

231 (discontinued)

Dual Channel 31-Band Equalizer