dbx

1231

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Item# DBX1231V
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$399.00399.0 each
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General Specifications

Max Output ">+21dBu balanced/unbalanced into 2kΩ or greater >+18dBm balanced/unbalanced (into 600Ω)"
Bandwidth 20Hz to 20kHz, +0.5/-1dB
Frequency Response <10Hz to >50kHz, +0.5/-3dB
Dynamic Range 109dB @ +/- 15dB Range; 115dB @ +/-6dB Range
Signal to Noise Ratio 90dB @ +/- 15dB Range; 97dB @ +/-6dB Range
THD+Noise <0.005%
Interchannel Crosstalk <-80dB, 20Hz to 20kHz
Bypass Switch Bypasses the graphic equalizer section in the signal path
Low cut Switch Activates the 40Hz 18dB/octave Bessel high-pass filter
Range Switch Selects either +/- 6dB or +/- 15dB slider boost/cut range
Operating Voltage 100VAC 50/60Hz, 120VAC 60Hz, 230VAC 50/60Hz
Power Consumption 24W
Power Connector IEC receptacle
Weight (lb) 10.6

Audio 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 40kΩ, unbalanced 20kΩ
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 200Ω, unbalanced 100Ω

Dimensions

Weight 10.6 lb (4.8 kg)
Height 5.25 in (13.4 cm)
Depth 7.9 in (20.1 cm)
Width 19 in (48.26 cm)
  • 1 x dbx 1231 dual channel 31 band graphic equalizer
  • 1 x AC power cord
  • 1 x Operation manual
  • 1 x Registration card
  • 4 x Rack mount screws and washers
The 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.

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