Loyola Enterprises

A veteran and minority owned SDB Certified Business.


DBX 231

757.498.6118 Ext - 109DBX 231 - Call for pricing - Dual 31 band EQ


PDFDBX 231 Cut Sheet (pdf)

PDFDBX 2-Series Manual (pdf)

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 ¼" inputs; nonconductive nylon sliders; and an intuitive user interface with comprehensive output and gain reduction metering. As always, the inevitable result of their 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 10 Hz to 50 kHz frequency response, to its 108dB dynamic range, internal torodial 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 in signal processing. With such affordable quality there’s no longer any excuse for compromising your sound.


  • Two 31-band, 1/3-octave Constant Q frequency bands
  • Switchable boost/cut ranges of ±6 or ±12dB
  • 12dB per octave 40Hz low-cut filter
  • Front panel bypass switch
  • ±12 dB input gain range
  • 4-segment LED ladders for monitoring output levels
  • XLR and TRS Inputs and Outputs
  • Internal Toroidal Transformer
  • Frequency Response of <10Hz to >50kHz
  • Dynamic range of greater than 108dB

Connectors ¼" TRS, Female XLR (pin 2 hot)
Type Electronically balanced/unbalanced, RF filtered
Impedance (bal./unbal.) 40 kΩ / 20 kΩ
Max. Input Level >+21dBu balanced or unbalanced
CMRR >40 dB, typically >55 dB at 1 kHz
Connector ¼" TRS, Male XLR (pin 2 hot)
Type Impedance-balanced/unbalanced, RF filtered
Impedance (bal./unbal.) 100 Ω / 50 Ω
Max. Output Level >+21dBu balanced/unbalanced into 2kΩ or greater
>+18dBm balanced/unbalanced (into 600Ω)
System Performance
Bandwidth (+0.5/-1dB) 20 Hz–20 kHz
Frequency Response (+0.5/-3dB) <10 Hz >50 kHz
Dynamic Range 108 dB
Signal-to-Noise Ratio 90 dB
THD+Noise <0.004%
Interchannel Crosstalk (20–20k Hz) <-80 dB
Function Switches
EQ Bypass Bypasses the graphic equalizer section in the signal path
Low Cut Activates the 50 Hz 12dB/octave high-pass filter
Range Selects either ±6 dB or ±12 dB slider boost/cut range
Power Requirements 100-230V 50/60 Hz, 15 Watts
Weight 2.7 kg (6 lbs)
Dimensions (HxWxD) 8.89 x 48.3 x 15.2 cm (3.5" x 19.0" x 6.0")
For pricing options and packages, contact us at
757.498.6118 Ext - 109, Or