Loyola Enterprises

A veteran and minority owned SDB Certified Business.


DBX 2031

757.498.6118 Ext - 109DBX 2031 - Call for pricing - Single 31 band EQ


PDFDBX 2031 Cut Sheet (pdf)

PDFDBX 20-Series Manual (pdf)

It’s amazing. One little button. So much effect. dbx® Type III® Noise Reduction is an entirely new concept... virtually instantaneous encode/decode within the circuitry of the box. They started out to build the finest EQs possible, boxes with the heritage and performance to rival the famous 30 Series EQs. And to no one’s surprise they came out awfully darn good. (Ask to see the Audio Precision plots compared to the competition.) But then, Roger (their chief engineer, a nice guy, as far as engineers go) got the crazy idea of putting this new noise reduction stuff in the box. It was amazing. The EQs sounded great without it but with it the performance was nothing short of incredible. Check it out yourself and see.

But hey, Roger wasn’t about to stop there. PeakPlus® Limiter. Who knows more about limiting than the folks at dbx; nobody... that’s who. So when the guys were developing this new series of EQs they wanted something that would be unique to these EQs. That’s when Roger got another one of his bright ideas and said “I bet they’ll work a lot better if there’s a cool limiter built in.” Next thing you know, all the guys are in the studio amazed at the new limiter Roger had designed specially for the 20 Series. Once again, hearing is believing... With a threshold range of 0dbu to plus 20dbu, the patent-pending PeakPlus limiter is designed to tame your program material from the subtlest nuances to the rowdiest hits. Also, the four stage LED ladder gives you a great visual indication as to what the limiter is doing.

You used to have to settle for second best in a reasonably priced EQ but not any more. With the new 20 Series from dbx Professional Products you get a great EQ circuit, a graceful yet powerful limiter and the revolutionary new design of the Type III Noise Reduction. Check out the dbx 20 Series graphic EQs at your pro audio outfitter. You’ll see, with the 20 Series EQs you get MORE!!!


  • Revolutionary instant encode/decode Type III® Noise Reduction in-circuit at the push of a button. Increases S/N ratio by up to 20dB
  • Patent-pending PeakPlus® Limiter threshold range from 0dBu to +24dBu (off) can transparently tame the wildest hits or the subtlest nuances of any signal
  • An extremely high quality EQ, patent-pending Type III Noise Reduction, and the elegant new PeakPlus Limiter all in one great sounding box
  • Four segment LED bar graph for BOTH Gain Reduction AND Output Level offers the most comprehensive visual feedback available
  • Status LEDs offer visual feedback for all settings on the front panel

Connectors ¼" TRS, Female XLR (pin 2 hot), and barrier terminal strip
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), and barrier terminal strip
Type Impedance-balanced/unbalanced, RF filtered
Impedance (bal./unbal.) 200 Ω / 100 Ω
Max. Output Level >+21dBu balanced/unbalanced into 2kΩ or greater
>+18dBm balanced/unbalanced (into 600Ω)
System Performance
Bandwidth (±0.5dB) 20 Hz–20 kHz
Frequency Response (+0.5/-3dB) <10 Hz >50 kHz
Dynamic Range (±15dB/±6dB) >108 dB / >112 dB
Signal-to-Noise (±15dB/±6dB) >90 dB / >94 dB
THD+Noise @ 1 kHz <0.04%, 0.02% typical at +4 dBu
Noise Reduction Up to 20dB of dynamic broadband noise reduction
Function Switches
Type III NR Activates dbx Type III Noise Reduction
EQ Bypass Bypasses the graphic equalizer section in the signal path
Low Cut Activates the 40 Hz 18dB/octave Bessel high-pass filter
Range Selects either ±6 dB or ±15 dB slider boost/cut range
Output Level 4-LED bar graph (Green, Green, Yellow, Red) at -10, 0, +10, and +18dBu
Gain Reduction 4-LED bar graph (all Red) at 0, 3, 6, and 10dB
Type III NR Active 1 LED: yellow
EQ Bypass 1 LED: red
Clip 1 LED: red
Low Cut 1 LED: red
±6 dB 1 LED: yellow
±15 dB 1 LED: red
Power Requirements 100-230V 50/60 Hz, 12 Watts
Weight 3.86 kg (8.5 lbs)
Dimensions (HxWxD) 8.9 x 48.3 x 20.1 cm (3.5" x 19.0" x 7.9")
For pricing options and packages, contact us at
757.498.6118 Ext - 109, Or