131s

The dbx 131s is a professional single-channel 31-band graphic equalizer designed for live sound, installed audio, recording, and broadcast applications. Featuring industry-standard 1/3-octave equalization, switchable boost/cut ranges, and low-noise circuitry, it provides precise tonal control and effective feedback management for demanding audio environments.

From The Manufacturer

The dbx 131s delivers the legendary performance of the dbx 12 Series in a compact, rugged design. Equipped with 31 constant-Q filters, balanced XLR and TRS connectivity, switchable ±6 dB or ±12 dB boost/cut ranges, and a bypass switch, it provides accurate frequency control while preserving signal integrity.

Key Features

• Single-channel 31-band graphic equalizer

• 1/3-octave constant-Q filters

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

• 20 mm non-conductive sliders

• Front-panel bypass switch

• XLR and ¼-inch TRS balanced inputs and outputs

• Frequency response from 10 Hz to 50 kHz

• Low-noise, high-headroom design

• Rugged steel chassis

• 1U rack-mount format

Specifications

• Product Type: Graphic Equalizer

• Channels: 1

• Equalizer Bands: 31 (1/3 Octave)

• Filter Type: Constant-Q

• Boost/Cut Range: ±6 dB or ±12 dB

• Frequency Response: 10 Hz – 50 kHz

• Dynamic Range: >112 dB

• THD+Noise: <0.003%

• Inputs: Balanced XLR, ¼-inch TRS

• Outputs: Balanced XLR, ¼-inch TRS

• Rack Size: 1U

• Power Supply: Internal Universal (100–240 VAC, 50/60 Hz)

Included

• dbx 131s Graphic Equalizer

• IEC Power Cable

• User Documentation

Applications

• Live sound reinforcement

• Houses of worship

• Recording studios

• Broadcast facilities

• Corporate AV

• Fixed installations

• Feedback suppression

• System tuning

Included Accessories

• IEC power cable

• User documentation

Accessories (Not Included)

• Audio cables

• Rack screws

• Flight case

• Power conditioner

Size

• 482.6 × 44.5 × 146 mm (19 × 1.75 × 5.75 in)

Weight

• 2.3 kg (5.1 lb)

Electrical/Thermal

• Power Supply: 100–240 VAC, 50/60 Hz

• Internal universal power supply

• Low-noise analogue signal path

• Designed for continuous professional operation