DBX 131S 31 Band Graphic Equalizer

DBX 131S

The 131s from dbx is a single channel, 31 band, 1/3 octave graphic equalizer housed in a single space, rack mount chassis. The processor is equally suitable for live applications, audio installations, and for use in a studio.


Dbx 131s 31 Band Graphic Equalizer

The unit features 20mm non-conductive sliders that can be set to either +/-6dB or +/-12dB of boost or cut. A global control provides +/-12 dB of input gain. A 12dB per octave, 3dB down at 50Hz low-cut filter can also be switched in if required.

From its extended frequency response and excellent dynamic range, to the quality components and meticulous attention to detail, the 131s offers exceptional sound and rugged reliability.

Single, 31-band, 1/3-octave constant Q graphic EQ
Switchable boost/cut ranges of +/-6 or +/-12dB
20mm non-conductive sliders
12dB per octave, 3dB down at 50Hz low-cut filter
+/-12 dB input gain range
Front panel bypass switch
4-segment LED ladders for monitoring output levels
XLR and 1/4" TRS inputs and outputs


Filter Type Graphic, constant Q
Number of Channels Single
Frequency Bands 31
Bandwidth 1/3-octave
Range (Boost/Cut) +/-6dB or +/-12 dB, switchable
Inputs 1 x XLR (pin 2 hot)
1 x 1/4" TRS phone 1
Input Impedance 40kΩ balanced, 20kΩ unbalanced
Maximum Input Level >+21dBu balanced or unbalanced
Outputs 1 x XLR (pin 2 hot)
1 x 1/4" TRS phone 2
Output Impedance 100Ω balanced, 50Ω unbalanced
Maximum Output Level >+21dBu balanced/unbalanced into 2kΩ or greater
>+18dBm balanced/unbalanced into 600Ω
Frequency Response FR: <10Hz to >50kHz, +0.5/-3.0dB
Bandwidth: 20Hz to 20kHz, +0.5/-1.0dB
Dynamic Range >112dB typical
Noise SNR: >95dB typical
THD + N <0.003%
Crosstalk <-90dB, 20Hz to 20kHz
CMRR >40dB, typically >55dB @ 1kHz
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 Requirements 100~240VAC 50/60Hz
15W power consumption
Dimensions (WxHxD) 19 x 6 x 1.75" (483 x 152 x 45mm)
Weight 4.8 lb (2.2kg)
Specialties 20mm non-conductive sliders

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See Also : Equalizer, Dbx