dbx 131s Single 31-Band Graphic Equalizer
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- SKU
- DBX131SV
Description
Overview
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.
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 Response of <10Hz to >50kHz
- Dynamic range of greater than 108dB
Specifications
| Input Connectors | 1/4" TRS,female XLR (pin 2 hot) |
| Input Type | Electronically balanced/unbalanced,RF filtered |
| Input Impedance | Balanced 40k ohm,unbalanced 20k ohm |
| Max Input | >+21dBu balanced or unbalanced |
| CMRR | >40dB,typically >55dB at 1kHz |
| Output Connectors | 1/4" TRS,male XLR (pin 2 hot) |
| Output Type | Impedance-balanced/unbalanced,RF filtered |
| Output Impedance | Balanced 100 ohm,unbalanced 50 ohm |
| Max Output | >+21dBu balanced/unbalanced into 2k ohm or greater; >+18dBm balanced/unbalanced (into 600 ohm) |
| Bandwidth | 20Hz to 20kHz,+0.5/-1dB |
| Frequency Response | <10Hz to >50kHz,+0.5/-3dB |
| Dynamic Range | Typically >112dB |
| Signal to Noise Ratio | Typically >95dB |
| THD+Noise | <0.003% |
| Interchannel Crosstalk | <-90dB,20Hz to 20kHz |
| Bypass Switch | Bypasses the graphic equalizer section in the signal path |
| Low cut Switch | Activates the 50Hz 12dB/octave high-pass filter |
| Range Switch | Selects either +/- 6dB or +/-12dB slider boost/cut range |
| Operating Voltage | 100-240VAC 50/60Hz |
| Power Consumption | 15W |
| Power Connector | IEC receptacle |
| Unit Weight | 4.8 lbs.(2.2 kg) |
| Shipping Weight | 6.2 lbs.(2.8kg) |
| Dimensions | 1.75" (4.4cm) H x 6"(15.24cm) D x 19" (48.26cm) W |
More Information
| Condition | New |
|---|---|
| Country of Manufacture | China |
Reviews
At a Glance
The dbx 131s is a single-channel 31-band graphic equalizer that delivers surgical frequency control across the full spectrum, making it the go-to choice for live sound engineers and touring professionals who need to shape and correct room acoustics on stage or in the venue. Built on four decades of dbx pro-audio heritage, it combines a low noise floor (>95 dB S/N ratio), switchable boost/cut ranges (±6 or ±12 dB), and rock-solid XLR/TRS connectivity to handle the demands of sound reinforcement, live performance, and installed venues. Choose it when you need a compact, affordable, and battle-tested EQ that won't compromise your tone or reliability.
Who This Is For
| Best suited for | Live Performance, Studio Sessions, Sound Reinforcement, Touring |
|---|---|
| Tonal character | Surgical frequency control, extended high-frequency response, low noise floor, precise gain staging |
| Skill level | Intermediate / Advanced / Professional |
Frequently Asked Questions
What does 31-band 1/3-octave equalization mean?
The 131s has 31 frequency bands spaced at 1/3-octave intervals, giving you surgical control over the entire audio spectrum from 20 Hz to 20 kHz. This density of bands lets you identify and correct narrow problem frequencies without affecting the overall tone.
Can I switch between different boost and cut ranges?
Yes. The front panel has a switch that toggles between ±6 dB and ±12 dB boost/cut ranges, so you can work with finer resolution for subtle EQ moves or deeper cuts and boosts when you need more aggressive shaping.
What inputs and outputs does it have?
The 131s includes both XLR and 1/4" TRS inputs and outputs (XLR pin 2 hot, standard pro audio configuration), so it integrates seamlessly into live rigs, studio patch bays, and installed sound systems.
Is there a bypass switch?
Yes, the front panel has a bypass switch so you can instantly compare your EQ'd signal to the unprocessed audio without patching the unit out of the chain.
How does the 131s compare to Behringer FBQ models?
The dbx 131s is a single-channel, fixed-frequency 31-band EQ with a 40-year professional heritage, >112 dB dynamic range, and >95 dB S/N ratio. Behringer FBQ models offer multi-channel options (2 or 31 channels) and some include automatic feedback detection, so the choice depends on whether you need single-channel precision or multi-channel flexibility.
Do I pay sales tax on this order?
Sales tax is collected only on orders shipped to California; orders shipped to any other US state are not charged sales tax at checkout when you buy direct from our website. At a typical 7% rate that is an estimated $19 less at checkout than the same listed price on a marketplace, which collects sales tax as the facilitator in most states. Buyers remain responsible for any use tax their state applies. Free US shipping and 30-day returns are included.
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