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.
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.
Features
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
Specifications
| 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 |
| 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 |
| 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 | 19 x 6 x 1.75″ (483 x 152 x 45mm) |
| Weight | 4.8 lb (2.2kg) |
| Specialties | 20mm non-conductive sliders |
Packaging Info
| Package Weight | 6.05 lb |
| Box Dimensions (LxWxH) | 21.9 x 11.3 x 2.5″ |
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