EQUALIZER 31x2
dbx 2231 Dual 31Band Graphic Equalizer
อีควอไลด์เซอร์ สไลด์ยาวมีลิมิตรเตอร์ 31ช่อง x2
OVERVIEW
The 2231 is a dual channel, 31 band 1/3 octave graphic equalizer with a difference. In addition to the usual features such as 45mm center detented sliders with selectable boost/cut range, high pass filters, active balanced input and output connections, variable input level controls, clip level indicators, and internal power supply, the unit provides both built-in noise reduction, and peak limiting.
The noise reduction is dbx's Type III, which can increases the signal to noise ratio of the 2231by up to 20dB at the push of a button. For further enhancement, a PeakPlus limiter is included. Front panel 41-detent rotary controls vary the threshold of the limiter, while four-LED gain reduction bar graphs display the resulting effect of the process. Additionally, the unit has EQ bypass switches with LED indicator for each channel, is housed in an all-steel constructed 3U chassis, and is intended for installation in standard 19" equipment racks. The XLR and 1/4" TRS connectors use balanced, low noise circuitry, and barrier strips are provided for added convenience.
The 2231 is designed to work with a variety of input signal levels and may be used in applications such as live sound, recording studios, instrument racks, as well as any conventional fixed installation environment.
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) |
