dbx 231s

Dual-channel 31-band Equalizer
dbx 231s image 1
dbx 231s image 1
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dbx 231s
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The Benchmark of Live EQs

There's a reason many of today's top live sound professionals turn to dbx for live sound EQs. With dbx's impeccable history of making robust and reliable graphic EQs, they've become a standard in touring rigs and installed PA systems everywhere. The dbx 231s dual-channel 31-band graphic equalizer lives up to the legacy - providing 1/3-octave Constant Q control beyond the audible frequency spectrum. Equipped with a switchable +/-6dB or +/-12dB, the 231s gives you fine control and superb sound quality. And with over 108dB of dynamic range, you know your sound is in good hands when you trust it to the dbx 231s graphic EQ.

dbx 231s Dual-channel 31-band Equalizer Features at a Glance:
  • 1/3-octave Constant Q frequency bands
  • Switchable boost/cut ranges of +/-6 or +/-12dB
  • 12dB/octave 50Hz low-cut filter
  • Front panel bypass switch
  • +/-12dB input gain range
  • 4-segment LED ladders for monitoring output level
  • XLR and TRS inputs and outputs
  • Frequency response of <10Hz to >50kHz
  • Dynamic range of greater than 108dB
  • Weight: 6.2 lbs.
  • Dimensions: 3.5" x 6" x 19"
For precision control and quality sound, count on the dbx 231s 31-band graphic equalizer!

Additional Media

215s, 131s, and 231s User Manual
231s Spec Sheet
Signal Processing Buying Guide

Tech Specs

Number of Bands 2 x 31-band
Q Type Fixed
Boost/Cut Range ±6 dB, ±12 dB (Switchable)
Low Cut Filter 50Hz, 12 dB/octave
Faders Throw Short-throw
Rack Spaces 2U
Height 3.5"
Depth 6"
Width 19"
Weight 6.2 lbs.
Manufacturer Part Number 231s

Customer Reviews

Based on 11 reviews
Write your review

Solid EQ.

I'd heard these were very clean, and that's definitely the case. With this much control, it's easy to dial out problems (and my tiny, tiny bedroom studio has many) and shape a killer sound. I just used this in conjunction with a Presonus Channel Strip and my Fender P and it was just as good as any sound I ever got out of my Ampeg. I'm doing all my bass recording straight into my computer through this guy from now on.

Fine performance.

First of all, I checked this unit for noise issues. I connected it to a 100% balanced audio path via the XLR jacks, set the gain to my normal levels, then began manipulating the faders at the +/- 12 dB scale. No hiss, nada. The EQ was perfectly quiet.My dbx 231s replaced an ancient dual-15-band Samson EQ which obviously wasn't giving me enough control in my desktop system. Thus far, I really like the results.
Music background: Audio restoration.



Church Sound Management

Very clean easy to use, cable jacks as needed.
Music background: Sound Tech

Sounds great

I received the unit promptly...which is not typical here in bush Alaska. I installed it and balanced the church sanctuary in about half an hour. Greatly increased intelligibility and greater gain before feedback. The best $200.00 I ever spent.
Music background: Recording studio owner, audio consultant, radio station General Manager
See also: Graphic Equalizers, dbx, dbx Graphic EQ, dbx Graphic EQ