DBX 2231 31 Band Stereo Graphic Equalizer and Compressor
With a prestigious heritage extending back to our heralded 30 Series equalizers, the DBX 2231 easily lives up to the revered DBX reputation. Besides including two 31-band channels of 1/3-octave equalization, the 2231 empowers you with flexible features like our PeakPlus™ limiter circuit, and our amazing Type III™ Noise Reduction system. It also includes +12 dB input gain range; switchable +6 or +15 dB boost/cut range; XLR, Barrier strip, 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.
Features:
- DBX’s revolutionary Type III™ Noise Reduction system, which increases S/N ratio by up to 20dB
- PeakPlus™ limiting technology with threshold range from 0dBu to +24dBu (off)
- Two 31-band, 1/3-octave channels with switchable boost/cut ranges of +6 or +15 dB
- +12 dB input gain range
- XLR, Barrier strip, and 1/4" inputs
- 4-segment LED ladders for monitoring of gain reduction and output levels–the most comprehensive visual feedback available
- Exceptional sound quality
- DBX’s unmatched engineering and construction standards
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 measurement 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
- Inter-channel 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)
- 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 measurement 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
- Inter-channel 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)
