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Overview

It's amazing. One little button. It has so much effect. The Type III® Noise Reduction is an entirely new concept... virtually instantaneous encode/decode within the circuitry of the box. We started out to build the finest EQ's possible, boxes with the heritage and performance to rival our famous 30 Series EQ's. 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 (our chief engineer, a nice guy, as far as engineers go) got the crazy idea of putting this new noise reduction stuff in the box. We listened to it and were amazed. The EQ's 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 EQ's they wanted something that would be unique to these EQ's. 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 0 to +20dbu, the 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.

20 Series EQ's. 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 EQ's at your pro audio outfitter. You'll see, with the 20 Series EQ's you get both MORE!!

Features

  • 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
  • Four segment LED bargraph for BOTH Gain Reduction AND Output Level
  • Status LEDs offer visual feedback for all settings on the front panel

Specifications

Input Connectors 1/4" TRS, female XLR (pin 2 hot), and barrier terminal strip
Input Type Electronically balanced/unbalanced, RF filtered
Input Impedance Balanced 40 kOhm, unbalanced 20 kOhm
Max Input >+21dBu balanced or unbalanced
CMRR >40dB, typically >55dB at 1kHz
Output Connectors 1/4" TRS, male XLR (pin 2 hot), and barrier terminal strip
Output Type Impedance-balanced/unbalanced, RF filtered
Output Impedance Balanced 200 ohm, unbalanced 100 ohm
Max Output >+21dBu balanced/unbalanced into 2 kOhm or greater; >+18dBm balanced/unbalanced (into 600 ohm)
Bandwidth 20Hz to 20kHz, +/-0.5dB
Frequency Response <10Hz to >50kHz, +0.5/-3dB
Signal-to-Noise (NR In: +/-6 and +/-15dB ranges) >102dB, unweighted, ref: +4dBu, 22kHz measurement bandwidth
Dynamic Range (NR In: +/-6dB and +/-15dB ranges) >120dB, unweighted
Signal-to-Noise (NR Out: +/-6dB range) >94dB, unweighted, ref: +4dBu, 22kHz measurment bandwidth
Dynamic Range (NR Out: +/-6dB range) >112dB, unweighted
Signal-to-Noise (NR Out: +/-15dB range) >90dB, unweighted, ref: +4dBu, 22kHz measurement bandwidth
Dynamic Range (NR Out: +/-15dB range) >108dB, unweighted
THD+Noise <0.04%, 0.02% typical at +4dBu, 1kHz
Interchannel Crosstalk <-80dB, 20Hz to 20kHz
Noise Reduction Up to 20dB of dynamic broadband noise reduction
NR Switch Activates dbx Type III Noise Reduction
Bypass Switch Bypasses the graphic equalizer section in the signal path
Low cut Switch (recessed) Activates the 40Hz 18dB/octave Bessel high-pass filter
Range Switch (recessed) Selects either +/- 6dB or +/- 15dB slider boost/cut range
I/O Meter 4-LED bar graph (Green, Green, Yellow, Red) at -10, 0, +10, and +18dBu
Gain Reduction Meter 4-LED bar graph (all Red) at 0, 3, 6, and 10dB
Indicators NR Active (Yellow); EQ Bypass (Red); Clip (Red); Low Cut (Red); +/-6dB (Yellow); +/-15dB (Red)
Operating Voltage 100VAC 50/60Hz; 120VAC 60Hz; 230VAC 50/60Hz
Power Consumption 28W
Power Connector IEC receptacle
Dimensions 5.25" H X 19" W X 7.9" D (13.335cm x 48.3cm x 20.1cm)

2231

Graphic Equalizer/Limiter with Type III™

MSRP
$799.95

Manuals/Documentation

Support/FAQs

2231 FAQs

Can I use the noise reduction in the iEQ or 20 Series EQs for eliminating noise in my system?

The dbx Type III & Type V noise reduction in our current EQ models (iEQ and 20 Series EQs) was not designed to be a single ended noise reduction for eliminating tape hiss or other noise. The noise reduction in our current EQ models is for lowering the inherent noise within the dbx EQ model only and will not reduce any other noise that is inherent in the system (i.e. any other device in the system). 

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