The dbx 1231V is a professional dual-channel equalizer designed for demanding sound reinforcement applications, from portable systems to touring setups. With 31 1/3 octave bands and ISO frequency centers, plus switchable ±6/±15 dB boost/cut and a ±12 dB input gain range, it delivers precise audio control for any environment.

Its balanced and servo-balanced inputs/outputs, XLR, barrier strip, and 1/4" TRS connectors, and chassis/signal ground lift ensure quiet operation and hum-free performance. Housed in a durable 3U steel/aluminum chassis, the 1231V provides years of maintenance-free operation, while its magnetically isolated transformer and RF-filtered inputs/outputs guarantee exceptional audio fidelity.

DBX 1231V Equalizer Features

  • Dual-channel 31 1/3 octave equalizer with ISO frequency centers

  • Switchable boost/cut ranges: ±6 dB or ±15 dB for precise adjustments

  • Electronically balanced/unbalanced inputs

  • Servo balanced/unbalanced outputs for noise-free operation

  • XLR, Barrier Strip, and 1/4" TRS connectors for installation flexibility

  • ±12 dB input gain range

  • Switchable 40 Hz, 18 dB/octave low-cut Bessel filters

  • Chassis/signal ground lift for hum isolation

  • Internal power supply transformer

  • Power-off hardwire relay bypass with 2-second power-up delay

  • Magnetically isolated transformer and RF-filtered inputs/outputs

  • Frequency response: 10 Hz to 50 kHz

  • Signal-to-noise ratio: >90 dB (ref +4 dBu)

  • THD+Noise: <0.005% (1 kHz at +4 dBu)

  • Interchannel crosstalk: < -80 dB (20 Hz – 20 kHz)

DBX 1231V Equalizer 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 kOhm, unbalanced 20 kOhm
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 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
Bypass Switch Bypasses the graphic equalizer section in the signal path
Low cut Switch (recessed) Activates the 40Hz 18dB/octave Bessel high-pass filter
Range Switch (recessed) Selects either +/- 6dB or +/- 15dB slider boost/cut range
I/O Meter 4-LED bar graph (Green, Green, Yellow, Red) at -10, 0, +10, and +18dBu
Indicators EQ Bypass (Red); Clip (Red); Low Cut (Red); +/-6dB (Yellow); +/-15dB (Red)
Operating Voltage 100VAC 50/60Hz; 120VAC 60Hz; 230VAC 50/60Hz
Power Consumption 24W
Power Connector IEC receptacle
Dimensions 5.25" H X 19" W X 7.9" D (13.4cm x 48.3cm x 20.1cm)
Unit Weight 10.6 lbs.
Shipping Weight 11.6 lbs.
List price: $793.75
Price: $635.00
SKU: DBX1231V
Catalog: 
Processors & DSP
Brand: 
DBX
Dimensions: 22 in × 12 in × 8 in
Weight: 14 lb