DBX 1231 2-Channel 31-Band Graphic Equalizer

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 1232 provides standard features like dual channels, thirty-one 2/3 octave bands, ISO frequency centers, +/-12 dB input gain range, and switchable low-cut filters, but also includes other thoughtful features. These include 45mm faders; selectable +/-6 dB 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 the engineers at dbx took to ensure compatibility for all installations. Only the best components were utilized, yielding an extremely wide frequency response, stellar signal-to-noise ratio and less than 0.005% THD +Noise, and extremely low interchannel crosstalk . All this attention to detail is contained in a 3U steel/aluminum chassis that will easily fit into your rack unit. It’s no wonder that dbx has been a leader in the industry for over 25 years.

Features

• Switchable boost / cut ranges of ±6 or ±15 dB
• Electronically balanced / unbalanced inputs
• Servo balanced / unbalanced inputs
• RF filtered inputs & outputs
• XLR, Barrier Strip, and 1/4" TRS connectors
• -12dB / +12dB input gain range
• 18 dB/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 delay

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 kΩ, unbalanced 20 kΩ
  • Max Input: > +21 dBu balanced or unbalanced
  • CMRR: >40 dB, typically > 55 dB 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 Ω, unbalanced 100 Ω
  • Max Output: > +21 dBu balanced/unbalanced into 2 kΩ or greater; > +18 dBm balanced/unbalanced (into 600Ω)
• 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
• Bypass Switch: Bypasses the graphic equalizer section in the signal path
• Low Cut Switch: (recessed) Activates the 40 Hz 18 dB/oct. Bessel high-pass filter
• Range Switch: (recessed) Selects either ±6 dB or ±15 dB slider boost/cut range
• I/O Meter: 4-LED bar graph at -10, 0, +10, and +18 dBu
• Operating Voltage: 100 VAC 50/60 Hz; 120 VAC 60 Hz; 230 VAC 50/60 Hz
• Power Consumption: 24 W
• Power Connector: IEC receptacle
• Dimensions (H x W x D): 5.25" x 19" x 7.9"
• Weight: 10.6 lbs.