DBX 1231 Dual 31-Band Graphic Equalizer

DBX 1231 Dual 31-Band Graphic Equalizer Specifications

Input:
- Connectors:
  - ¼-inch / 6.35mm Jack
  - Female XLR (pin 2 hot)
  - Barrier terminal strip
- Type: Electronically balanced/unbalanced, RF filtered
- Impedance:
  - Balanced: 40 kΩ
  - Unbalanced: 20 kΩ
- Max Input Level: >+21 dBu balanced or unbalanced
- CMRR: >40 dB, typically >55 dB at 1kHz

Outputs:
- Connectors:
  - ¼-inch / 6.35mm Jack
  - Male XLR (pin 2 hot)
  - Barrier terminal strip
- Type: Impedance-balanaced/unbalanced, RF filtered
- Impedance:
  - Balanced: 200 Ω
  - Unbalanced: 100 Ω
- Max Output Level:
  - >+21 dBu balanced/unbalanced into 2 kΩ or greater
  - >+18 dBm balanced/unbalanced (into 600 Ω)

System Performance:
- Bandwidth: 20Hz to 20kHz, +0.5/-1 dB
- Frequency Response: <10Hz to >50kHz, +0.5/-3 dB, ±15 dB range, ±6 dB range
- Dynamic Range: Typically >115 dB
- Signal-to-Noise: Typically >97 dB
- THD + Noise: <0.005%
- Interchannel Crosstalk: <-80 dB, 20Hz to 20kHz

Function Switches:
- EQ Bypass: Bypasses the graphic equalizer section in the signal path
- Low Cut: Activates the 40Hz 12 dB/octave high-pass filter
- Range: Selects either ± 6 dB or ±15 dB slider boost/cut range

Indicators:
- Output Level Meter: 4-LED bar graph (Green, Green, Yellow, Red) at -10, 0, +10, and +18 dBu
- EQ Bypass: 1 LED, Red
- Clip: 1 LED, Red
- Low Cut: 1 LED, Red
- ±6 dB: 1 LED, Yellow
- ±15 dB: 1 LED, Red

Electrical:
- Operating Voltage: 100-240VAC 50/60Hz
- Power consumption: 24W
- Mains Connection: IEC receptacle

Physical:
- Dimensions (W x H x D): 483 x 13.4 x 201 mm / 19 x 5.25 x 7.9 inches
- Weight: 4.8 kg / 10.6 lbs

Further Product Information Below