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.
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.
Switchable boost/cut ranges of ±6 or ±15 dBElectronically balanced/unbalanced inputsServo balanced/unbalanced outputsRF filtered inputs and outputsXLR, Barrier Strip, and 1/4" TRS connectors-12dB/+12dB input gain range18dB/octave 40Hz Bessel low-cut filterChassis/signal ground lift capabilityInternal power supply transformerPower-off hardwire relay bypass with 2-second power-up delay
Input Connectors : 1/4" TRS, female XLR (pin 2 hot), and barrier terminal stripInput Type : Electronically balanced/unbalanced, RF filteredInput Impedance : Balanced 40 kOhm, unbalanced 20 kOhmMax Input : >+21dBu balanced or unbalancedCMRR : >40dB, typically >55dB at 1kHzOutput Connectors : 1/4" TRS, male XLR (pin 2 hot), and barrier terminal stripOutput Type : Impedance-balanced/unbalanced, RF filteredOutput Impedance : Balanced 200 ohm, unbalanced 100 ohmMax Output : >+21dBu balanced/unbalanced into 2 kOhm or greater; >+18dBm balanced/unbalanced (into 600 ohm)Bandwidth : 20Hz to 20kHz, +0.5/-1dBFrequency Response : <10Hz to >50kHz, +0.5/-3dB; +/-15dB range; +/-6dB rangeDynamic Range : 109dB; 115dBSignal to Noise Ratio : 90dB, 97dBTHD+Noise : <0.005%Interchannel Crosstalk : <-80db, 20Hz to 20kHzBypass Switch : Bypasses the graphic equalizer section in the signal pathLow cut Switch : (recessed) Activates the 40Hz 18dB/octave Bessel high-pass filterRange Switch : (recessed) Selects either +/- 6dB or +/- 15dB slider boost/cut rangeI/O Meter : 4-LED bar graph (Green, Green, Yellow, Red) at -10, 0, +10, and +18dBuIndicators : EQ Bypass (Red); Clip (Red); Low Cut (Red); +/-6dB (Yellow); +/-15dB (Red)Operating Voltage : 100VAC 50/60Hz; 120VAC 60Hz; 230VAC 50/60HzPower Consumption : 24WPower Connector : IEC receptacleDimensions : 5.25" H X 19" W X 7.9" D (13.4cm x 48.3cm x 20.1cm)Unit Weight : 10.6 lbs.Shipping Weight : 11.6 lbs.