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dbx 1231 Dual Channel 31-Band Parametric Equaliser
OverviewThe dbx 12 Series were designed to meet the needs of the most demanding sound reinforcement environments, while offering the simplicity of straightforward controls. The 1231 provides standard features like dual-channels, 31 1/3 octave bands, ISO frequency centers, +/- 12 dB input gain range, and switchable 40Hz/18 dB per octave low-cut filters, but also includes other insightful features. These include 45 mm faders; selectable +/-6dB or +/-15dB boost/cut range for precise gain adjustments; XLR, barrier strip, and 1/4” TRS connectors for installation ease; balanced inputs and outputs for quiet operation; and chassis/signal ground lift capabilities for quick hum isolation. The visionary design of the dbx 12 Series makes your job easier.The dbx 12 Series Equalizers were precision engineered to provide years of maintenance-free operation in any application. The magnetically isolated transformer, electronically balanced/unbalanced inputs and servo balanced/unbalanced outputs, RF-filtered inputs and outputs, and power-off hard-wire relay bypass with 2 second power up delay were steps our engineers took to ensure compatibility for all installations. Only the best components were utilized, yielding a 10Hz to 50kHz frequency response, greater than 90dB SNR (ref +4dBu), less than 0.005% THD +Noise (1kHz at +4dBu), and interchannel crosstalk of less than -80dB from 20Hz to 20kHz. All this attention to detail is contained in a 3U steel/aluminum chassis.Features Switchable boost/cut ranges of 6 or 15 dB Electronically balanced/unbalanced inputs Servo balanced/unbalanced outputs RF filtered inputs and outputs XLR, Barrier Strip, and 1/4″ TRS connectors -12dB/+12dB input gain range 18dB/octave 40Hz Bessel low-cut filter Chassis/signal ground lift capability Internal power supply transformer Power-off hardwire relay bypass with 2-second power-up delaySpecifications 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, +0.5/-1dB Freq. Response <10Hz to >50kHz, +0.5/-3dB; +/-15dB range; +/-6dB range Dynamic Range 109dB; 115dB SNR
90dB, 97dB THD+Noise <0.005% Crosstalk <-80db, 20Hz to 20kHz 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 Low cut Switch Activates 40 Hz Butterworth, 12 dB/octave high-pass filter, one switch per channel. I/O Meter 4-LED bar graph (Green, Green, Yellow, Red) at -10, 0, +10, and +18dBu Indicators EQ Bypass (Red); Clip (Red); Low Cut (Red); +/-6dB (Yellow); +/-15dB (Red) Mode Switch Selects stereo/mono and 2/3-way operation LF Sum Switch Selects normal (stereo) or mono-summed low frequency operation and disables Ch 2s low output phase invert LED to indicate that this output is not operational in the LF sum mode. Indicators Stereo Operation (Green); Mono Operation (Yellow); Low Cut (Red-per channel); x10 (Green-per channel); Phase Invert (Red-per output) Operating Voltage 230VAC 50/60Hz Consumption 24W Power Connector IEC receptacle Dimensions 5.25" H X 19" W X 7.9" D (13.4cm x 48.3cm x 20.1cm) Unit Weight 10.6 lbs. (4.8 kg) Shipping Weight 11.6 lbs. (5.3 kg) For more Info please visit: http://dbxpro.com/en/products/1231
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Category: Musical Instruments:Pro Audio Equipment:Signal Processors and Effects
Location: London, London