While being part of the ‘entry level’ range of dbx equalisers, the single rackspace 131S still draws on the heritage spanning four decades, making dbx a proven go-to workhorse. 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. Great sound and rugged reliability. Also in this range: 215S (dual 15 band), and 231S (dual 31 band)
DBX 131S

1 in stock (can be backordered)
- 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
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 | 2.2 kg |
Shipping Weight | 2.8kg |
Dimensions | 4.4cm H x 15.24cm D x 48.26cm W |