2231

Graphic Equalizer/Limiter with Type III™

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.

Frequency range: to 50 kHz; FREQUENCY RANGE
Dynamic range: >120 dB; DYNAMIC RANGE
Weight: –; WEIGHT

Supplied and supported in Pakistan by KYAF, the official HARMAN Professional distributor.

AT A GLANCE

Specifications

to 50 kHz
Frequency range: >120 dB
Dynamic range: 5.25" H X 19" W X 7.9" D
Dimensions: 1/4" TRS, female XLR
Inputs: 1/4" TRS, male XLR
Output Connectors: 50kHz, +0.5/-3dB
Frequency Response: >112dB, unweighted
Dynamic Range (NR Out: +/-6dB range): >108dB, unweighted
Dynamic Range (NR Out: +/-15dB range)

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	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	231s
Input Connectors	1/4" TRS, female XLR (pin 2 hot), and barrier terminal strip	1/4" TRS, female XLR (pin 2 hot)
Input Type	Electronically balanced/unbalanced, RF filtered	Electronically balanced/unbalanced, RF filtered
Input Impedance	Balanced 40 kOhm, unbalanced 20 kOhm	Balanced 40k ohm, unbalanced 20k ohm
Max Input	>+21dBu balanced or unbalanced	>+21dBu balanced or unbalanced
CMRR	>40dB, typically >55dB at 1kHz	>40dB, typically >55dB at 1kHz
Output Connectors	1/4" TRS, male XLR (pin 2 hot), and barrier terminal strip	1/4" TRS, male XLR (pin 2 hot)
Output Type	Impedance-balanced/unbalanced, RF filtered	Impedance-balanced/unbalanced, RF filtered
Output Impedance	Balanced 200 ohm, unbalanced 100 ohm	Balanced 100 ohm, unbalanced 50 ohm
Max Output	>+21dBu balanced/unbalanced into 2 kOhm or greater; >+18dBm balanced/unbalanced (into 600 ohm)	>+21dBu balanced/unbalanced into 2k ohm or greater; >+18dBm balanced/unbalanced (into 600 ohm)
Bandwidth	20Hz to 20kHz, +/-0.5dB	20Hz to 20kHz, +0.5/-1dB
Frequency Response	50kHz, +0.5/-3dB	50kHz, +0.5/-3dB
THD+Noise	<0.04%, 0.02% typical at +4dBu, 1kHz	<0.003%
Interchannel Crosstalk	<-80dB, 20Hz to 20kHz	<-90dB, 20Hz to 20kHz
Bypass Switch	Bypasses the graphic equalizer section in the signal path	Bypasses the graphic equalizer section in the signal path

FOR DESIGNERS AND INSTALLERS

Downloads

dbx's own files, opened here on the KYAF site.

dbx 2231 — 2231
Graphic Equalizer/Limiter with Type III™

DESIGN

Every part of the 2231, labelled.

FEATURES

What the 2231 brings.

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.