DBX 1231V | Dual 31 Band Graphic Equalizer

1231V

Dual Channel 31-Band Graphic Equalizer

The 1231 is dual channel, 31 band 1/3 octave graphic equalizer. It was designed to meet the needs of the most demanding sound reinforcement environments, while offering the simplicity of straightforward controls.

The sliders of the 1231 are 45mm center detent, with two selectable boost/cut ranges for precise gain adjustments. The unit features high pass filters with bypass, active balanced input and output connections, chassis/signal ground lift capabilities for quick hum isolation and an internal power supply. Multiple input and output configurations are provided for ease of use. The XLR and 1/4" TRS connectors use active balanced, low noise circuitry, with the addition of barrier strips.

The 1231 was precision engineered to provide years of maintenance-free operation in any application. The magnetically isolated transformer, RF-filtered inputs and outputs, and power-off hard-wire relay bypass with two second power up delay, ensures compatibility with all types of installations.

• Dual channel 31 band 1/3 octave graphic equalizer
• Switchable Boost/Cut range between +/-6dB and +/-15dB
• 45mm center detent sliders
• Fixed high-pass filters
• Variable input level controls
• Active balanced input and output connections
• RF filtered inputs and outputs
• Chassis/signal ground lift capability

Specifications

• Input Impedance
  • Balanced 40 Kilohms, unbalanced 20 Kilohms 
• Max Input
  • >+21dBu Balanced or Unbalanced 
• CMRR:
  • >40dB, Typically >55dB at 1 kHz 
• 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
  • >+21 dBu Balanced/Unbalanced into 2 Kilohms or Greater; >+18 dBm Balanced/Unbalanced (into 600 Ohm)
• Bandwidth
  • 20 Hz to 20 kHz, +0.5/-1 dB
• Frequency Response
  • <10 Hz to >50 kHz, +0.5/-3 dB; +/-15 dB range; +/-6 dB Range
• Dynamic Range
  • 109 dB; 115 dB 
• Signal to Noise Ratio
  • 90 dB, 97 dB
• THD+Noise
  • <0.005%
• Interchannel Crosstalk
  • <-80 dB, 20 Hz to 20 kHz 
• Switch Type
  • Bypass Switch: Bypasses the Graphic Equalizer Section in the Signal Path
  • Low Cut Switch (Recessed): Activates the 40 Hz 18 dB/Octave Bessel High-Pass Filter
  • Range Switch (Recessed): Selects Either +/- 6 dB or +/- 15 dB
  • Slider Boost/Cut Range 
• Indicators 
  • I/O Meter: 4-LED Bar Graph (Green, Green, Yellow, Red) at -10, 0, +10, and +18 dBu 
  • Indicators: EQ Bypass (Red); Clip (Red); Low Cut (Red); +/-6 dB (Yellow); +/-15 dB (Red) 
• Audio I/O
  • 2x XLR 3-Pin Line Input
  • 2x XLR 3-Pin Line Output
  • 2x 1/4" TRS Line Input
  • 2x 1/4" TRS Line Output 
• Power Source
  • AC Input (Included)
• AC Input Power
  • 100 to 230 VAC, 50 / 60 Hz
• Power Consumption
  • 24 W 
• Color
  • Black
• Dimensions
  • 19 x 7.9 x 5.25" / 48.3 x 20.1 x 13.34 cm
• Weight
  • 10.6 lb / 4.8 kg

In The Box

• dbx 1231 - Dual Channel 31-Band Graphic Equalizer
• Power Cable
• Limited 2-Year Manufacturer Warranty