DBX 131S

The dbx 131s is a professional 31-band, 1/3-octave graphic equalizer designed to deliver exceptional sound quality and rugged reliability. Built for the demands of live sound, studio, and installed audio systems, it combines intuitive operation with the precision and power dbx is known for. With a switchable +/-6 dB or +/-12 dB boost/cut range, +/-12 dB input gain, and a 50 Hz low-cut filter, the 131s provides powerful tone-shaping tools in a compact 1U rackmount format.

Equipped with nonconductive 20mm sliders, a front-panel bypass switch, and 4-segment LED output metering, the 131s ensures quick setup and real-time monitoring. Its extended frequency response from <10 Hz to >50 kHz, dynamic range over 108 dB, and low distortion (<0.003%) make it an ideal choice for professionals who need reliable, high-fidelity EQ in any application.

• Single 31-Band Graphic EQ: Provides 1/3-octave equalization for precision tone shaping and system tuning.

• Switchable Boost/Cut Range: Choose between +/-6 dB or +/-12 dB for flexible control over EQ adjustments.

• Wide Frequency Coverage: Operates from <10 Hz to >50 kHz with smooth response and accuracy.

• High Dynamic Range: Over 108 dB of dynamic range and ultra-low distortion (<0.003%) for clean, professional sound.

• Built-In Low-Cut Filter: Switchable 50 Hz high-pass filter helps eliminate unwanted low-end rumble.

• Bypass Function: Instantly removes EQ from the signal path for quick A/B comparisons.

• Clear Level Monitoring: LED output meters provide visual feedback of output levels.

• Tour-Ready Build Quality: Rugged construction with nonconductive 20mm sliders for long-term reliability.

• Flexible Connectivity: XLR and TRS inputs and outputs allow easy integration into any audio setup.

• Universal Power Supply: Supports 100-240V AC operation for global compatibility.

GENERAL SPECIFICATIONS:

• Product Type: Single-channel, 31-band graphic equalizer

• Application: Studio, touring, installed sound

• Band Type: Constant Q, 1/3-octave frequency bands

• Bypass: Front panel bypass switch for signal path

• Range Switch: Selectable +/-6 dB or +/-12 dB boost/cut

• Input Gain Range: +/-12 dB

• Output Level Metering: 4-segment LED ladder meters

• Low-Cut Filter: 50 Hz, 12 dB/octave high-pass filter

• Power Supply: 100"240 VAC, 50/60 Hz universal input

• Power Consumption: 15 W

• Power Connector: IEC receptacle

AUDIO PERFORMANCE:

• Frequency Response: <10 Hz to >50 kHz (+0.5/-3 dB)

• Bandwidth: 20 Hz to 20 kHz (+0.5/-1 dB)

• Dynamic Range: >112 dB (typical)

• Signal to Noise Ratio: >95 dB (typical)

• THD + Noise: <0.003%

• Interchannel Crosstalk: <-90 dB (20 Hz to 20 kHz)

• CMRR: >40 dB (typical >55 dB @ 1 kHz)

INPUT SPECIFICATIONS:

• Connectors: 1/4" TRS, XLR female (pin 2 hot)

• Type: Electronically balanced/unbalanced, RF filtered

• Impedance: 40k ohms (balanced), 20k ohms (unbalanced)

• Maximum Input Level: >+21 dBu (balanced/unbalanced)

OUTPUT SPECIFICATIONS:

• Connectors: 1/4" TRS, XLR male (pin 2 hot)

• Type: Impedance-balanced/unbalanced, RF filtered

• Impedance: 100 ohms (balanced), 50 ohms (unbalanced)

• Maximum Output Level:

• >+21 dBu into 2k ohms or greater

• >+18 dBm into 600 ohms

PHYSICAL SPECIFICATIONS:

• Height: 1.75 in (4.4 cm)

• Width: 19 in (48.26 cm)

• Depth: 6 in (15.24 cm)

• Unit Weight: 4.8 lbs (2.2 kg)

• Shipping Weight: 6.2 lbs (2.8 kg)