dbx 131s Single Channel 31-Band Graphic Equalizer

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Shipped From
MusicMann Studios
Milwaukee, WI, United States
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About This Listing

When the pros need an EQ, they turn to dbx. With a proven track record that spans four decades, dbx EQs are the industry standard for touring, studios, and audio installations. With the dbx heritage of revered pro EQs, the 131s meets the needs of the most demanding sound reinforcement environments, while offering the simplicity of straightforward controls.

The dbx 131s includes a single 31-band channel of 1/3-octave equalization, ±12 dB input gain, switchable ±6 dB or ±12 dB boost/cut range, 20mm nonconductive sliders, an intuitive user interface, and output level metering. From its extended 10Hz to 50kHz frequency response and 110 dB dynamic range to the quality componentry and meticulous attention to detail, the 131s offers exceptional sound and rugged reliability that guarantees you will always sound your best.

Sure to find a home in the studio, on tour and with installed sound venues, the dbx 131s is destined to take its rightful place in the lineage of great dbx signal processors that are the professional's choice in signal processing. With such affordable quality, there's no longer any excuse for compromising your sound.

dbx 131s Features

  • Single 31-band, 1/3-octave Constant Q frequency bands

  • Switchable boost/cut ranges of ±6 or ±12dB

  • 12dB per octave, 3dB down @ 50Hz low-cut filter

  • Front panel bypass switch

  • ±12 dB input gain range

  • 4-segment LED ladders for monitoring output levels

  • XLR and TRS Inputs and Outputs

  • Frequency Repsonse of <10Hz to >50kHz

  • Dynamic range of greater than 108dB


  • Connectors: 1/4" TRS, female XLR (pin 2 hot)

  • Type: Electronically balanced/unbalanced, RF filtered

  • Impedance: Balanced 40k ohm, unbalanced 20k ohm

  • Max Input Level: >+21dBu balanced or unbalanced

  • CMRR: >40dB, typically >55dB at 1kHz


  • Connectors: 1/4" TRS, male XLR (pin 2 hot)

  • Type: Impedance-balanaced/unbalanced, RF filtered

  • Impedance: Balanced 100 ohm, unbalanced 50 ohm

  • Max Output Level: >+21dBu balanced/unbalanced into 2k ohm or greater

  • >+18dBm balanced/unbalanced (into 600 ohm)

System Performance

  • Bandwidth: 20Hz to 20kHz, +0.5/-1dB

  • Frequency Response: <10Hz to >50kHz, +0.5/-3dB

  • Dynamic Range: Typicall >112dB

  • Signal-to-Noise: Typically >95dB

  • THD+Noise: <0.003%
    Interchannel Crosstalk: <-90dB, 20Hz to 20kHz

Function Switches

  • EQ Bypass: Bypasses the graphic equalizer section in the signal path

  • Low Cut: Activates the 50Hz 12dB/octave high-pass filter

  • Range: Selects either +/- 6dB or +/- 12dB slider boost/cut range

Power Supply

  • Operating Voltage: 100VAC-240VAC 50/60Hz

  • Power consumption: 15W

  • Mains Connection: IEC receptacle


  • Weight: 4.8 lbs. (2.17 kg) Shipping weight 6.2 lbs. (2.81 kg)

  • Dimensions: 1.75" (4.44 cm) H x 6"(15.24 cm) D x 19" (48.26 cm) W

Product Specs

ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.learn more
Made In
  • United States

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