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dbx 231 User Manual

dbx 231
12 pages
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User Manual
2-Series
Graphic Equalizers
131
215
231
®
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dbx 231 Specifications

General IconGeneral
Maximum Input Level+21dBu
Maximum Output Level+21dBu
Power Supply100VAC 50/60Hz, 120VAC 60Hz, 230VAC 50/60Hz
Input ConnectorsXLR, 1/4" TRS
Input TypeElectronically balanced/unbalanced, RF filtered
Output ConnectorsXLR, 1/4" TRS
Interchannel Crosstalk<-80dB, 20Hz to 20kHz
Filter TypeConstant Q
Bandwidth1/3 octave
Frequency Response50kHz
Input ImpedanceBalanced 40kΩ, Unbalanced 20kΩ
Output TypeServo-balanced/unbalanced, RF filtered
Signal to Noise Ratio>90dB
Boost/Cut Range±6dB or ±12dB
Power Requirements15W
Frequency Bands31-band, 1/3 octave
Range±6 or ±12 dB
Noise-90dBu, unweighted

Summary

Important Safety Instructions

General Electrical Safety Precautions

Warnings about opening the unit, exposure to moisture, ventilation, heat, and servicing by qualified personnel.

Power Cord and Grounding Safety

Instructions on proper wiring, earthing, wire colors, and grounding connection for safe operation.

Lithium Battery Safety

Warnings and precautions regarding lithium battery replacement and disposal.

UK Mains Plug Warning

Instructions regarding the UK mains plug, fuse, and disposal.

Declaration of Conformity

Manufacturer's declaration of product compliance with safety and EMC directives.

Electromagnetic Compatibility

Statements on product compliance with EMC directives and usage conditions.

Service Information

Technical Support and Service Contact

Instructions for obtaining technical support, troubleshooting, and returning products for service.

Warranty Policy

Product Warranty Terms

Explains warranty validity, proof of purchase, and limitations for the product.

Introduction and Features

Product Overview and Capabilities

Introduces the dbx 2-Series and lists its key technical features.

Package Contents Verification

Lists items to check for in the product package to ensure completeness.

Operating Controls

Front Panel Controls

Overview of the input gain, bypass, boost/cut range selection, and output level indicators.

Frequency Band and Low Cut Adjustments

Details on using frequency band sliders and activating the low-cut filter.

Connecting the EQ to Your System

Audio and Power Connections

Steps for making audio connections via XLR/TRS and applying AC power.

Rack Mounting and Environmental Considerations

Guidance on rack installation, ambient temperature, and avoiding RF/EMI interference.

Rear Panel Descriptions

131 Single Channel 31 Band Graphic EQ Rear

Description of rear panel connectors and polarity for the 131 model.

215 Dual Channel 15 Band Graphic EQ Rear

Description of rear panel connectors and polarity for the 215 model.

Installation and Operation Notes

Input/Output Configurations and Cabling

Details on balanced/unbalanced connections, input impedance, and output load considerations.

Audio Signal Processing Applications

Guidance on using graphic equalizers for tuning acoustics and improving sound quality.

Specifications

Input and Output Specifications

Details on connectors, impedance, and maximum levels for inputs and outputs.

System Performance Metrics

Covers bandwidth, frequency response, dynamic range, signal-to-noise, THD, and crosstalk.

Function Switches and Power

Describes EQ bypass, low cut, range selection, operating voltage, and power consumption.

Physical Dimensions and Certifications

Provides unit dimensions, weight, and relevant certifications (CE, UL).

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