dbx 231s - Dual-Channel 31-Band Graphic Equalizer with Switchable 6 or 12 dB Boost/Cut Ranges and XLR/TRS Inputs/Outputs in White Finish

The dbx 231s Dual-Channel 31-Band Graphic Equalizer stands as a testament to dbx's commitment to professional audio excellence, reflecting over four decades of industry-leading innovation. Designed for both high-demand sound reinforcement environments and everyday audio applications, the 231s offers an impressive array of features that cater to the needs of touring engineers, studio professionals, and permanent installations alike.

At the core of the dbx 231s are its dual 31-band, 1/3-octave Constant Q frequency bands, which allow for detailed and precise equalization across two separate channels. This level of control is essential for tailoring sound to specific acoustical environments, ensuring optimal audio performance. The unit provides a ±12 dB input gain range and features switchable boost/cut ranges of ±6 dB or ±12 dB, enabling fine-tuned adjustments to meet the exacting demands of professional audio processing.

The dbx 231s is equipped with 20mm nonconductive sliders that facilitate smooth and durable operation. Its intuitive user interface ensures that adjustments are straightforward and efficient. The front panel includes a bypass switch for quick comparison between equalized and unprocessed signals, enhancing the ease of making precise adjustments.

With a frequency response extending from <10Hz to >50kHz, the 231s ensures that audio signals are reproduced with exceptional fidelity. The unit's dynamic range exceeds 108 dB, providing clarity and detail even in the most demanding situations. Additionally, the 231s features a 12 dB per octave low-cut filter at 50Hz, which helps to remove unwanted low-frequency noise and improve overall audio clarity.

The dbx 231s incorporates 4-segment LED ladders for accurate output level monitoring, allowing users to keep an eye on signal levels and prevent distortion. For connectivity, the equalizer provides both XLR and 1/4-inch TRS inputs and outputs, offering versatility in integration with various audio systems. These connections are electronically balanced/unbalanced and RF filtered, which helps to minimize noise and interference in the audio signal.

Encased in a durable 3.5-inch high, 1U white steel chassis, the dbx 231s is built to withstand the rigors of professional use while maintaining a clean and sleek appearance. It operates on a versatile power supply that accommodates voltages from 100 to 240VAC at 50/60Hz, with a power consumption of just 15 watts. The IEC mains connection ensures reliable power integration.

In summary, the dbx 231s Dual-Channel 31-Band Graphic Equalizer combines advanced technical specifications with robust design to deliver exceptional audio performance. Its high-quality components, precise equalization capabilities, and user-friendly features make it a valuable tool for any professional audio setup.

Features

• Dual 31-band, 1/3-octave Constant Q frequency bands for precise dual-channel equalization
• Switchable boost/cut ranges of ±6 dB or ±12 dB for flexible audio adjustments
• 12 dB per octave, 50Hz low-cut filter to reduce low-frequency noise
• 20mm nonconductive sliders for smooth, reliable control
• Front panel EQ bypass switch for easy signal comparison
• 4-segment LED ladders for accurate output level monitoring
• XLR and 1/4-inch TRS inputs and outputs for versatile connectivity
• Electronically balanced/unbalanced inputs and outputs with RF filtering
• Frequency response from <10Hz to >50kHz, ±0.5/-3 dB
• Dynamic range of greater than 108 dB, typically >112 dB
• Signal-to-noise ratio of typically >95 dB
• Total harmonic distortion plus noise (THD+Noise) <0.003%
• Interchannel crosstalk < -90 dB from 20Hz to 20kHz
• Dimensions: 19 x 6 x 3.5 inches
• Weight: 6.2 lbs; Shipping weight: 7.9 lbs

Specifications

Inputs

• Connectors: 1/4-inch TRS, female XLR (pin 2 hot)
• Type: Electronically balanced/unbalanced, RF filtered
• Impedance: Balanced 40kΩ, unbalanced 20kΩ
• Max Input Level: >+21dBu balanced or unbalanced
• CMRR: >40dB, typically >55dB at 1kHz

Outputs

• Connectors: 1/4-inch TRS, male XLR (pin 2 hot)
• Type: Impedance-balanced/unbalanced, RF filtered
• Impedance: Balanced 100Ω, unbalanced 50Ω
• Max Output Level: >+21dBu balanced/unbalanced into 2kΩ or greater, >+18dBm balanced/unbalanced (into 600Ω)

System Performance

• Bandwidth: 20Hz to 20kHz, +0.5/-1dB
• Frequency Response: <10Hz to >50kHz, +0.5/-3dB
• Dynamic Range: Typically >112dB
• Signal-to-Noise: Typically >95dB
• THD+Noise: <0.003%
• Interchannel Crosstalk: <-90dB, 20Hz to 20kHz

Function 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 Supply

• Operating Voltage: 100-240VAC 50/60Hz
• Power Consumption: 15W
• Mains Connection: IEC receptacle

Physical

• Dimensions: 19 x 6 x 3.5 inches
• Weight: 6.2 lbs
• Shipping Weight: 7.9 lbs