dbx 1231

dbx 1231 Dual Channel 31-Band Equaliser

The dbx 1231 is a high-performance graphic equaliser tailored for audio enthusiasts and professionals. Featuring 31 bands of precision EQ, it provides extensive control over the audio spectrum for shaping and optimising sound in diverse settings. With its reliable design and versatility, the dbx 1231 is a go-to choice for those seeking advanced equalisation capabilities in studio, live sound, or installed audio setups.

2013

dbx 1231 Dual Channel 31-Band Equaliser Details

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 dbx 1231 provides standard features like dual-channels, 31 1/3 octave bands, ISO frequency centres, +/- 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 Equalisers 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 utilised, 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/aluminium 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 delay

Specifications

  • Input Impedance Balanced 40 kOhm, unbalanced 20 kOhm
  • Max Input >+21dBu balanced or unbalanced
  • CMRR >40dB, typically >55dB at 1kHz
  • 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
  • Frequency Response <10Hz to >50kHz, +0.5/-3dB; +/-15dB range; +/-6dB range
  • Dynamic Range 109dB; 115dB
  • Signal to Noise Ratio 90dB, 97dB
  • THD+Noise <0.005%
  • Interchannel Crosstalk <-80db, 20Hz to 20kHz

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The details provided above are drawn from historical documents like advertising brochures or user manuals. They’re shared without bias or review. This info is given solely for your consideration, helping you gauge its usefulness to you.

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