The dbx 131SV is a professional-grade, single-channel 31-band graphic equalizer built for the most demanding sound reinforcement, studio, and installation applications. Backed by dbx’s four-decade heritage of pro audio excellence, the 131SV combines exceptional sonic performance with rugged, road-ready reliability.

This 1/3-octave equalizer provides precise tonal control across 31 frequency bands with a switchable boost/cut range of ±6 or ±12 dB and ±12 dB input gain. Its nonconductive 20mm sliders and intuitive user interface allow fast, reliable adjustments, while the 4-segment LED output meters provide clear visual feedback for accurate level monitoring.

The 131SV delivers extended frequency response from under 10Hz to over 50kHz, a dynamic range exceeding 108 dB, and XLR and TRS I/O for compatibility with professional audio systems. Its low-cut filter at 50Hz (12 dB/octave, 3 dB down) ensures clean low-end control, making it ideal for live sound, touring, studio, and installed audio environments.

With dbx quality components and meticulous design, the 131SV guarantees transparent, musical EQ performance, ensuring you always sound your best—without compromise.

DBX 131 Features

  • Single-channel, 31-band graphic EQ with 1/3-octave Constant Q bands

  • Switchable boost/cut range: ±6 dB or ±12 dB

  • Input gain: ±12 dB for precise level control

  • Low-cut filter: 12 dB/octave, 3 dB down @ 50 Hz

  • Front panel bypass switch for instant EQ bypass

  • 4-segment LED meters for output level monitoring

  • Professional I/O: XLR and TRS connectors

  • Frequency response: <10Hz to >50kHz

  • Dynamic range: >108 dB

  • Rugged, road-ready design for studio, tour, or installation

DBX 131 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
List price: $331.25
Price: $265.00
SKU: DBX131SV
Catalog: 
Processors & DSP
Brand: 
DBX
Dimensions: 23 in × 12 in × 5 in
Weight: 7 lb